10-Q

UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWASHINGTON, D.C. 20549FORM 10-Q

[X]    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2013

or

[  ]    TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 1-11430

--

MINERALS TECHNOLOGIES INC. (Exact name of registrant as specified in its charter)

DELAWARE	25-1190717
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

622 Third Avenue, New York, New York 10017-6707(Address of principal executive offices, including zip code)

(212) 878-1800 (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

YES   X   NO  _____

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

YES   X    NO

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b2 of the Exchange Act.

Large Accelerated Filer [ X ] Accelerated Filer [  ] Non- accelerated Filer [  ] Smaller Reporting Company [  ]

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

YES  NO   X 

Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.

Class Common Stock, $0.10 par value Outstanding at April  12, 2013 34,861,809

MINERALS TECHNOLOGIES INC.

INDEX TO FORM 10-Q

		Page No.
PART I.    FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Condensed Consolidated Statements of Income for the three-month periods ended March 31, 2013 and April 1, 2012 (Unaudited)	3
	Condensed Consolidated Statements of Comprehensive Income for the three-month periods ended March 31, 2013 and April 1, 2012 (Unaudited)	4
	Condensed Consolidated Balance Sheets as of March 31, 2013 (Unaudited)and December 31, 2012	5
	Condensed Consolidated Statements of Cash Flows for the three-month periods ended March 31, 2013 and April 1, 2012 (Unaudited)	6
	Notes to Condensed Consolidated Financial Statements (Unaudited)	7
	Review Report of Independent Registered Public Accounting Firm	15
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	16
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	22
Item 4.	Controls and Procedures	23
PART II.  OTHER INFORMATION
Item 1.	Legal Proceedings	23
Item 1A.	Risk Factors	24
Item 2.	Unregistered  Sales of Equity Securities and Use of Proceeds	24
Item 3.	Default Upon Senior Securities	24
Item 4.	Mine Safety Disclosures	24
Item 5.	Other Information	25
Item 6.	Exhibits	25
Signature		26

PART I.  FINANCIAL INFORMATION

ITEM 1.  Financial Statements

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIESCONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited)

				Three Months Ended
(thousands, except per share data)						March 31, 2013		April 1, 2012
Net sales					$	251,289	$	257,138
Cost of goods sold						196,401		202,201
	Production margin					54,888		54,937
Marketing and administrative expenses						22,934		22,898
Research and development expenses						4,818		5,047
	Income from operations					27,136		26,992
Non-operating income (deductions), net						168		(598	)
	Income from continuing operations before provision for taxes					27,304		26,394
Provision for taxes on income						7,700		7,786
	Consolidated net income					19,604		18,608
Less: Net income attributable to non-controlling interests						848		576
			Net income attributable to Minerals Technologies Inc. (MTI)		$	18,756	$	18,032
Earnings per share:
		Basic			$	0.54	$	0.51
		Diluted			$	0.53	$	0.51
Cash dividends declared per common share					$	0.05	$	0.025
Shares used in computation of earnings per share:
		Basic				34,996		35,436
		Diluted				35,253		35,600

See accompanying Notes to Condensed Consolidated Financial Statements.

3

MINERALS TECHNOLOGIES INC.  AND SUBSIDIARY COMPANIESCONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

				Three Months Ended
(thousands of dollars)					March 31,  2013			April 1, 2012
Consolidated net income				$	19,604		$	18,608
Other comprehensive income, net of tax:
	Foreign currency translation adjustments				(14,785	)		9,099
	Pension and postretirement plan adjustments				1,766			1,821
	Cash flow hedges:
		Net derivative gains (losses) arising during the period			586			(534	)
Comprehensive income					7,171			28,994
Comprehensive income attributable to
			non-controlling interest		(379	)		(943	)
Comprehensive income attributable to MTI				$	6,792		$	28,051

See accompanying Notes to Condensed Consolidated Financial Statements.

4

MINERALS TECHNOLOGIES INC.  AND SUBSIDIARY COMPANIESCONDENSED CONSOLIDATED BALANCE SHEETS

ASSETS
(thousands of dollars)				March 31,  2013*			December 31, 2012**
Current assets:
	Cash and cash equivalents		$	454,331		$	454,092
	Short-term investments, at cost which approximates market			15,586			14,178
	Accounts receivable, net			197,834			193,328
	Inventories			88,755			84,569
	Prepaid expenses and other current assets			18,364			18,318
		Total current assets		774,870			764,485
Property, plant and equipment, less accumulated depreciation and depletion – March 31, 2013- $943,676; December 31, 2012 - $944,283….....				312,436			317,669
Goodwill				65,081			65,829
Other assets and deferred charges				58,732			63,206
		Total assets	$	1,211,119		$	1,211,189
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
	Short-term debt		$	7,226		$	7,111
	Current maturities of long-term debt			77,260			76,977
	Accounts payable			109,857			98,371
	Other current liabilities			55,785			67,639
		Total current liabilities		250,128			250,098
Long-term debt				8,200			8,478
Accrued Pension and Post-Retirement Benefits				108,719			108,035
Other non-current liabilities				31,313			30,859
		Total liabilities		398,360			397,470
Shareholders' equity:
	Common stock			4,717			4,700
	Additional paid-in capital			349,470			345,929
	Retained earnings			1,049,870			1,032,869
	Accumulated other comprehensive loss			(63,162	)		(51,198	)
	Less common stock held in treasury			(551,337	)		(541,889	)
Total  MTI shareholders' equity				789,558			790,411
Non-controlling interest				23,201			23,308
		Total shareholders' equity		812,759			813,719
		Total liabilities and shareholders' equity	$	1,211,119		$	1,211,189

*Unaudited**Condensed from audited financial statements

See accompanying Notes to Condensed Consolidated Financial Statements.

5

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIESCONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

			Three Months Ended
(thousands of dollars)					March 31, 2013			April 1, 2012
Operating Activities:
Consolidated net income				$	19,604		$	18,608
Adjustments to reconcile net income to net cash
	provided by operating activities:
		Depreciation, depletion and amortization			11,599			13,026
		Payments relating to restructuring activities			--			(620	)
		Other non-cash items			2,070			1,874
		Net changes in operating assets and liabilities			(8,584	)		(8,168	)
Net cash provided by operating activities					24,689			24,720
Investing Activities:
Purchases of property, plant and equipment					(8,681	)		(9,354	)
Proceeds from sale of short-term investments					--			1,484
Purchases of short-term investments					(941	)		(2,583	)
Net cash used in investing activities					(9,622	)		(10,453	)
Financing Activities:
Net repayment of short-term debt					(81	)		(593	)
Purchase of common shares for treasury					(7,587	)		--
Proceeds from issuance of stock under option plan					2,751			2,084
Cash dividends paid					(1,754	)		(887	)
Dividends paid to non-controlling interests					(486	)		--
Excess tax benefits related to stock incentive programs					184			--
Net cash provided by (used in) financing activities					(6,973	)		604
Effect of exchange rate changes on cash and cash equivalents					(7,855	)		4,982
Net increase in cash and cash equivalents					239			19,853
Cash and cash equivalents at beginning of period					454,092			395,152
Cash and cash equivalents at end of period				$	454,331		$	415,005
Supplemental disclosure of cash flow information:
Interest paid				$	172		$	158
Income taxes paid				$	5,657			10,583
Non-cash financing activities:
Treasury stock purchases settled after period-end				$	1,860		$	--

See accompanying Notes to Condensed Consolidated Financial Statements.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Note 1.  Basis of Presentation

     The accompanying unaudited condensed consolidated financial statements have been prepared by management in accordance with the rules and regulations of the United States Securities and Exchange Commission.  Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted.  Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2012.  In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included.  The results for the three-month period ended March 31, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.

     Certain reclassifications were made to prior year amounts to conform to current year presentation.

     On November 14, 2012 the Company's Board of Directors authorized a two-for-one stock split of the of the Company's outstanding common stock, which was effected in the form of a 100-percent stock distribution payable on December 11, 2012 to shareholders of record on November 27, 2012.  Treasury shares were not treated as outstanding shares in the stock split.  The par-value of the Company's stock remained at $0.10 per share.  Unless otherwise noted, all share amounts and per share calculations in this quarterly report on Form 10-Q have been adjusted for all periods presented to reflect the impact of this split and to provide data on a comparable basis.

Note 2.  Summary of Significant Accounting Policies

     Use of Estimates

     The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, allowance for doubtful accounts, valuation of inventories, valuation of long-lived assets, goodwill and other intangible assets, pension plan assumptions, income tax, income tax valuation allowances, and litigation and environmental liabilities. Actual results could differ from those estimates.

Note 3.  Earnings Per Share (EPS)

     Basic earnings per share are based upon the weighted average number of common shares outstanding during the period.  Diluted earnings per share are based upon the weighted average number of common shares outstanding during the period assuming the issuance of common shares for all potentially dilutive common shares outstanding.

The following table sets forth the computation of basic and diluted earnings per share:

		Three Months Ended
Basic EPS (in millions, except per share amounts)			March 31, 2013		April 1, 2012
	Net income attributable to MTI	$	18.8	$	18.0
Weighted average shares outstanding			35.0		35.4
Basic earnings per share attributable to MTI		$	0.54	$	0.51

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

		Three Months Ended
Diluted EPS (in millions, except per share amounts)			March 31, 2013		April 1, 2012
	Net income attributable to MTI	$	18.8	$	18.0
Weighted average shares outstanding			35.0		35.4
Dilutive effect of stock options and stock units			0.3		0.2
Weighted average shares outstanding , adjusted		$	35.3	$	35.6
Diluted earnings per share attributable to MTI		$	0.53	$	0.51

     Options to purchase 239,770 and 257,886 shares of common stock for the three-month periods ended March 31, 2013 and April 1, 2012, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of the common shares.

Note 4.   Income Taxes

     As of March 31, 2013, the Company had approximately $5.0 million of total unrecognized income tax benefits. Included in this amount were a total of $3.3 million of unrecognized income tax benefits that, if recognized, would affect the Company's effective tax rate. While it is expected that the amount of unrecognized tax benefits will change in the next 12 months, we do not expect the change to have a significant impact on the results of operations or the financial position of the Company.

     The Company's accounting policy is to recognize interest and penalties accrued relating to unrecognized income tax benefits as part of its provision for income taxes. The Company had a net increase of approximately $0.1 million during the first three months of 2013, and had an accrued balance of $1.1 million of interest and penalties as of March 31, 2013.

     The Company operates in multiple taxing jurisdictions, both within and outside the U.S.  In certain situations, a taxing authority may challenge positions that the Company has adopted in its income tax filings. The Company, with a few exceptions (none of which are material), is no longer subject to U.S. federal, state, local, and European  income tax examinations by tax authorities for years prior to 2006.

Note 5.   Inventories

     The following is a summary of inventories by major category:

(millions of dollars)		March 31, 2013		December 31, 2012
Raw materials	$	34.0	$	30.8
Work-in-process		6.8		6.5
Finished goods		26.8		26.5
Packaging and supplies		21.2		20.8
Total inventories	$	88.8	$	84.6

Note 6.  Goodwill and Other Intangible Assets

     Goodwill and other intangible assets with indefinite lives are not amortized, but instead are tested for impairment, at least annually. The carrying amount of goodwill was $65.1 million and $65.8 million as of March 31, 2013 and December 31, 2012, respectively.  The net change in goodwill since December 31, 2012 was attributable to the effect of foreign exchange.

8

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

   Acquired intangible assets subject to amortization as of March 31, 2013 and December 31, 2012 were as follows:

	March 31, 2013			December 31, 2012
(millions of dollars)		Gross Carrying Amount	Accumulated Amortization		Gross Carrying Amount	Accumulated Amortization
Patents and trademarks	$	6.0	3.5		6.0	3.4
Customer lists		2.9	2.4		2.9	2.4
	$	8.9	5.9		8.9	5.8

     The weighted average amortization period for acquired intangible assets subject to amortization is approximately 15 years.  Estimated amortization expense is $0.6 million for 2013 and $0.4 million each of the next five years through 2018.

     Included in other assets and deferred charges is an intangible asset of approximately $0.5 million which represents the non-current unamortized amount paid to a customer in connection with contract extensions at seven PCC satellite facilities.  In addition, a current portion of $0.4 million is included in prepaid expenses and other current assets.  Such amounts will be amortized as a reduction of sales over the remaining lives of the customer contracts.  Approximately $0.1 million was amortized in the first quarter of 2013. Estimated amortization as a reduction of sales is as follows: remainder of 2013 - $0.3 million; 2014 - $0.4 million; 2015 - $0.1 million.

Note 7.   Long-Term Debt and Commitments

     The following is a summary of long-term debt:

(millions of dollars)			March 31, 2013		December 31, 2012
5.53% Series 2006A Senior Notes
	Due October 5, 2013		$	50.0	$	50.0
Floating Rate Series 2006A Senior Notes
	Due October 5, 2013			25.0		25.0
Variable/Fixed Rate Industrial
	Development Revenue Bonds Series 1999 Due November 1, 2014			8.2		8.2
Installment obligations				1.4		1.4
Other borrowings				0.9		0.9
		Total		85.5		85.5
Less: Current maturities				77.3		77.0
Long-term debt			$	8.2	$	8.5

     As of March 31, 2013, the Company had $191.2 million of uncommitted short-term bank credit lines, of which approximately $7.2 million was in use.

Note 8.  Benefit Plans

The Company and its subsidiaries have pension plans covering the majority of eligible employees on a contributory or non-contributory basis. .  The Company also provides postretirement health care and life insurance benefits for the majority of its U.S. retired employees.   Disclosures for the U.S. plans have been combined with those outside of the U.S. as the international plans do not have significantly different assumptions, and together represent less than 25% of our total benefit obligation.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Components of Net Periodic Benefit Cost

				Pension Benefits						Other Benefits
				Three Months Ended						Three Months Ended
(millions of dollars)				March 31, 2013			April 1, 2012			March 31, 2013			April 1, 2012
Service cost			$	2.3		$	2.3		$	0.2		$	0.2
Interest cost				2.8			2.9			0.1			0.1
Expected return on plan assets				(3.7	)		(3.5	)		--			--
Amortization:
	Prior service cost			0.3			0.3			(0.8	)		(0.8	)
	Recognized net actuarial loss			3.4			3.4			--			--
		Net periodic benefit cost	$	5.1		$	5.4		$	(0.5	)	$	(0.5	)

     Amortization amounts of prior service costs and recognized net actuarial losses are recorded, net of tax, as increases to accumulated other comprehensive income.

Employer Contributions

     The Company expects to contribute approximately $10 million to its pension plans and $1.0 million to its other post retirement benefit plans in 2013.  As of March 31, 2013, $0.9 million has been contributed to the pension plans and approximately $0.2 million has been contributed to the other post retirement benefit plans.

Note 9.  Comprehensive Income

The following are the reclassifications out of accumulated other comprehensive income, net of related tax:

(millions of dollars)		March 31, 2013
Amortization of prior service cost	$	(0.3	)
Amortization of actuarial gains(losses)		2.0
Total reclassifications from accumulated other comprehensive income	$	1.7

The above amounts are included in net periodic pension costs.  Please see note 8 to the condensed consolidated financial statements.

The major components of accumulated other comprehensive income, net of related tax, are as follows:

(millions of dollars)	Foreign Currency Translation Adjustments			Unrecognized Pension Costs			Net Gain on Cash Flow Hedges		Total
Balance as of December 31, 2012	$	32.0		$	(85.3	)	$	2.1	$	(51.2	)
Other comprehensive income/loss before reclassifications		(14.3	)		--			0.6		(13.7	)
Amounts reclassified from AOCI		--			1.7			--		1.7
Net current period other comprehensive income/loss		(14.3	)		1.7			0.6		(12.0	)
Balance as of March 31, 2013	$	17.7		$	(83.6	)	$	2.7	$	(63.2	)

Note 10.  Accounting for Asset Retirement Obligations

The Company records asset retirement obligations for situations in which the Company will be required to incur costs to retire tangible long-lived assets. These are primarily related to its PCC satellite facilities and mining operations. The Company has also recorded the provisions related to conditional asset retirement obligations at its facilities.  The Company has recorded asset retirement obligations at all of its facilities except where there are no

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

legal or contractual obligations.  The associated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset.

     The following is a reconciliation of asset retirement obligations as of March 31, 2013:

(millions of dollars)
Asset retirement liability, December 31, 2012	$	15.0
Accretion expense		0.2
Additions		0.1
Reversals		(0.3	)
Foreign currency translation and other		(0.1	)
Asset retirement liability,  March 31, 2013	$	14.9

     The current portion of the liability of approximately $0.4 million is included in other current liabilities and  the long-term portion of the liability of approximately $14.5 million is included in other non-current liabilities in the Condensed Consolidated Balance Sheet as of March 31, 2013.

Note 11.  Legal Proceedings

     Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials.  The Company currently has 72 pending silica cases and 10 pending asbestos cases. To date, 1,394 silica cases and 33 asbestos cases have been dismissed. Four new asbestos cases were filed in the first quarter of 2013, and one was dismissed.  Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any.  Additional claims of this nature may be made against the Company or its subsidiaries.  At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations.

     The Company has not settled any silica or asbestos lawsuits to date.  We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage.  The aggregate cost to the Company for the legal defense of these cases since inception was approximately $0.2 million, the majority of which has been reimbursed by Pfizer Inc pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. Of the 10 pending asbestos cases, all allege liability based on products sold largely or entirely prior to the initial public offering, and for which the Company is therefore entitled to indemnification pursuant to such agreements. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits.

Environmental Matters

        On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination. We are now conducting a site-specific risk assessment required by the regulators.

We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Though the cost of the likely remediation remains uncertain pending completion of the phased remediation decision process, we have estimated that the Company's share of the cost of the encapsulation and limited soil removal described above would approximate $0.4 million, which has been accrued as of March 31, 2013.

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

     The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection ("DEP") on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010.  The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater.  Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of March 31, 2013.

     The Company and its subsidiaries are not party to any other material pending legal proceedings, other than routine litigation incidental to their businesses.

Note 12.  Non-Operating Income and Deductions, Net

		Three Months Ended
(millions of dollars)			March 31, 2013			April 1, 2012
	Interest income	$	0.7		$	1.0
	Interest expense		(0.8	)		(0.8	)
	Foreign exchange gains (losses)		0.6			(0.4	)
	Other deductions		(0.3	)		(0.4	)
Non-operating income (deductions), net		$	0.2		$	(0.6	)

Note 13 .  Non-controlling interests

     The following is a reconciliation of beginning and ending total equity, equity attributable to MTI, and equity attributable to non-controlling interests:

		Equity Attributable to MTI
(millions of dollars)		Common Stock		Additional  Paid-in Capital		Retained Earnings			AccumulatedOtherComprehensive Income (Loss)			Treasury  Stock			Non-controlling Interests			Total
Balance as of December 31, 2012		$	4.7	$	345.9	$	1,032.9		$	(51.2	)	$	(541.9	)	$	23.3		$	813.7
Net income			--		--		18.8			--			--			0.9			19.7
Other comprehensive income			--		--		--			(12.0	)		--			(0.5	)		(12.5	)
Dividends declared			--		--		(1.8	)		--			--			--			(1.8	)
Dividends to non-controlling interest			--		--		--			--			--			(0.5	)		(0.5	)
Employee benefit transactions			--		2.7		--			--			--			--			2.7
Income tax benefit arising from employee
	stock option plans		--		0.7		--			--			--			--			0.7
Purchase of common stock for treasury			--		--		--			--			(9.4	)		--			(9.4	)
Stock based compensation			--		0.2		--			--			--			--			0.2
Balance as of March 31, 2013		$	4.7	$	349.5	$	1,049.9		$	(63.2	)	$	(551.3	)	$	23.2		$	812.8

The income attributable to non-controlling interests for the three-month periods ended March 31, 2013 and April 1, 2012 was from continuing operations. The remainder of the income was attributable to MTI. There were no changes in MTI's ownership interest for the period ended March 31, 2013 as compared with December 31, 2012.

12

MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Note 14.  Segment and Related Information

     Segment information for the three-month periods ended March 31, 2013 and April 1, 2012 was as follows:

Net Sales
(millions of dollars)	Three Months Ended
		March 31, 2013		April 1, 2012
Specialty Minerals	$	167.7	$	167.7
Refractories		83.6		89.4
Total	$	251.3	$	257.1

Income from Operations
(millions of dollars)	Three Months Ended
		March 31, 2013		April 1, 2012
Specialty Minerals	$	22.2	$	19.9
Refractories		6.9		9.1
Total	$	29.1	$	29.0

     The carrying amount of goodwill by reportable segment as of March 31, 2013 and December 31, 2012 was as follows:

Goodwill
(millions of dollars)
	Three Months Ended
		March 31, 2013	December 31, 2012
Specialty Minerals	$	13.6	14.1
Refractories		51.5	51.7
Total	$	65.1	65.8

     A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows:

Income from operations before provision for taxes on income:		Three Months Ended
(millions of dollars)			March  31, 2013			April 1,  2012
Income from operations for reportable segments		$	29.1		$	29.0
Unallocated corporate expenses			(2.0	)		(2.0	)
Consolidated income from operations			27.1			27.0
Non-operating income (deductions)			0.2			(0.6	)
Income from continuing operations
	before provision for taxes on income	$	27.3		$	26.4

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MINERALS TECHNOLOGIES INC. AND SUBSIDIARY COMPANIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

     The Company's sales by product category are as follows:

		Three Months Ended
(millions of dollars)			March 31, 2013		April 1, 2012
Paper PCC		$	121.3	$	121.7
Specialty PCC			16.8		16.4
Talc			12.4		12.1
Ground Calcium Carbonate			17.2		17.5
Refractory Products			62.4		69.1
Metallurgical Products			21.2		20.3
	Net sales	$	251.3	$	257.1

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REVIEW REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors and Shareholders Minerals Technologies Inc.:

     We have reviewed the accompanying condensed consolidated balance sheet of Minerals Technologies Inc. and subsidiaries as of March 31, 2013, the related condensed consolidated statements of income and comprehensive income for the three-month periods ended March 31, 2013 and April 1, 2012, and the related condensed consolidated statements of cash flows for the three-month periods ended March 31, 2013 and April 1, 2012.  These condensed consolidated financial statements are the responsibility of the Company's management.

     We conducted our reviews in accordance with the standards of the Public Company Accounting Oversight Board (United States).  A review of interim financial information consists principally of applying analytical procedures and making inquiries of persons responsible for financial and accounting matters.  It is substantially less in scope than an audit conducted in accordance with the standards of the Public Company Accounting Oversight Board (United States), the objective of which is the expression of an opinion regarding the financial statements taken as a whole.  Accordingly, we do not express such an opinion.

     Based on our review, we are not aware of any material modifications that should be made to the condensed consolidated financial statements referred to above for them to be in conformity with U.S. generally accepted accounting principles.

     We have previously audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheet of Minerals Technologies Inc. and subsidiaries as of December 31, 2012, and the related consolidated statements of income, comprehensive income, shareholders' equity, and cash flows for the year then ended (not presented herein); and in our report dated February 22, 2013, we expressed an unqualified opinion on those consolidated financial statements.  In our opinion, the information set forth in the accompanying condensed consolidated balance sheet as of December 31, 2012 is fairly stated, in all material respects, in relation to the consolidated balance sheet from which it has been derived.

/s/ KPMG LLP

New York, New York April 26, 2013

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ITEM 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations

	Income and Expense Items  as a Percentage of Net Sales
	Three Months Ended
		March 31, 2013		April 1, 2012
Net sales		100.0	%	100.0	%
Cost of goods sold		78.2		78.6
Production margin		21.8		21.4
Marketing and administrative expenses		9.1		8.9
Research and development expenses		1.9		2.0
Income from operations		10.8		10.5
Net income attributable to MTI		7.5	%	7.0	%

Executive Summary

    The Company reported earnings per share in the first quarter of 2013 of $0.53, an increase of 4% over $0.51 reported in the first quarter of 2012.  Net income increased 4% to $18.8 million as compared to $18.0 million in the prior year.  The results reflected continued solid financial performance.

     Worldwide sales for the first quarter of 2013 decreased 2% from the prior year to $251.3 million from $257.1 million.  Foreign exchange had an unfavorable impact on sales of approximately $2.0 million or one percentage point.

     The Company continued to advance the execution of its growth strategies of geographic expansion and new product innovation and development.  During the first quarter of 2013, we experienced volume growth of 8% in our Paper PCC operations in Asia as a result of three new satellites which began operations since the first quarter of last year.  Our agreement with United Steel Company B.S.C. (SULB), in Bahrain, which began operations in the third quarter of 2012, generated sales of $2.0 million in the first quarter of 2013.  We expect to generate between $8 million-$10 million per year of revenue over the 3 year term of the contract.  The Company continues to see progress in our major growth strategy of developing and commercializing new products as our FulFill® platform of technologies of higher filler loading resulted in three more commercial agreements, our first two agreements in North America and our first agreement in Brazil.  We presently have thirteen commercial contracts for FulFill®.  We expect the contribution of our FulFill® program to operating income between $2.5 million and $3.0 million in 2013.

     Income from operations grew 1% to $27.1 million in the first quarter of 2013 from $27.0 million in the first quarter of 2012. Our Specialty Minerals segment reported a first quarter record operating income of $22.2 million, a 12% increase over the prior year.  However, our Refractories segment continues to be affected by weak steel conditions in our two largest markets, North America and Europe.  Operating Income for this segment declined 24% to $6.9 million in the first quarter of 2013.  The Company achieved productivity improvements of 6% over the prior year due to our Operational Excellence programs.

     The Company's balance sheet as of March 31, 2013 continues to be very strong.  Cash, cash equivalents and short-term investments were approximately $470 million.  We have available lines of credit of $191 million and our debt to equity ratio was 10%.  Our cash flows from operations were approximately $25 million in the first quarter of 2013.

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     We face some significant risks and challenges in the future:

· The industries we serve, primarily paper, steel, construction and automotive, have been adversely affected by the uncertain global economic climate, primarily in Europe. Although these markets have stabilized, our global business could be adversely affected by further decreases in economic activity.  Our Refractories segment primarily serves the steel industry.  North America and Europe steel production in the first quarter of 2013 decreased approximately 5% from the prior year.  In the paper industry, which is served by our Paper PCC product line, first quarter 2013 production levels for printing and writing papers within North America and Europe, our two largest markets, both decreased 5% from the prior year.  Our Processed Minerals and Specialty PCC product lines are affected by the domestic building and construction markets and the automotive market all of which experienced growth.

· Some of our customers may experience mill shutdowns due to further consolidations, or may face liquidity issues, or bankruptcy, which could deteriorate the aging of our accounts receivable, increase our bad debt exposure and possibly trigger impairment of assets or realignment of our businesses.

· Consolidations and rationalizations in the paper and steel industries concentrate purchasing power in the hands of fewer customers, increasing pricing pressure on suppliers such as us.

· Most of our Paper PCC sales are subject to long-term contracts that may be terminated pursuant to their terms, or may be renewed on terms less favorable to us.

· We are subject to volatility in pricing and supply availability of our key raw materials used in our Paper PCC product line and Refractory product line.

· We continue to rely on China for a portion of our supply of magnesium oxide in the Refractories segment, which may be subject to uncertainty in availability and cost.

· Fluctuations in energy costs have an impact on all of our businesses.

· Changes in the fair market value of our pension assets, rates of return on assets, and discount rates could continue to have a significant impact on our net periodic pension costs as well as our funding status.

· As we expand our operations abroad we face the inherent risks of doing business in many foreign countries, including foreign exchange risk, import and export restrictions, and security concerns.

· The Company's operations, particularly in the mining and environmental areas (discharges, emissions and greenhouse gases), are subject to regulation by federal, state and foreign authorities and may be subject to, and presumably will be required to comply with, additional laws, regulations and guidelines which may be adopted in the future.

During the second quarter of 2011, M-real Corporation announced plans to divest its Alizay paper mill in France. Since that time, the mill has not been operating. In January 2013, Double A Paper Company announced it had acquired the Alizay mill.  We expect the paper mill to resume operations in the first half of 2013 and, while there can be no assurance, we expect to negotiate a contract and resume operations.  In 2011, sales from our Alizay satellite were approximately $7 million.

The Company has evaluated this facility for impairment of assets and, based upon the information currently available and probability-weighted cash flows of various potential outcomes, has determined that no impairment charge was required in the first quarter.

   The Company plans to discontinue its operations at its merchant PCC facility at Walsum, Germany in the second quarter.   The Company recorded an impairment charge related to Walsum in connection with the Company's 2007 restructuring of its European coating PCC operations, with this facility continuing to operate well below capacity levels. The Company anticipates that the residual closure costs of this facility will result in a second quarter charge of up to $6 million.
    

Outlook

     Looking forward, we remain cautious about the state of the global economy, particularly in Europe, and the impact it will have on our product lines.   

     In 2013, the Company will continue to focus on innovation and new product development and other opportunities for sales growth as follows:

· Develop multiple high-filler technologies, such as filler-fiber, under the FulFill^TM platform of products, to increase the fill rate in freesheet paper and continue to progress with commercial discussions and full-scale

17

	paper machine trials.
·	Increase our sales of PCC for paper by further penetration of the markets for paper filling at both freesheet and groundwood mills, particularly in emerging markets.
·	Expand the Company's PCC coating product line using the satellite model.
·	Promote the Company's expertise in crystal engineering, especially in helping papermakers customize PCC morphologies for specific paper applications.
·	Expand PCC produced for paper filling applications by working with industry partners to develop new methods to increase the ratio of PCC for fiber substitutions.
·	Develop unique calcium carbonates and talc products used in the manufacture of novel biopolymers, a new market opportunity.
·	Deploy new talc and GCC products in paint, coating and packaging applications.
·	Deploy value-added formulations of refractory materials that not only reduce costs but improve performance.
·	Expand our solid core wire product line into BRIC, Middle Eastern and other Asian countries.
·	Deploy our laser measurement technologies into new applications.
·	Expand our refractory maintenance model to other steel makers globally.
·	Deploy operational excellence principles into all aspects of the organization, including system infrastructure and lean principles.
·	Explore selective acquisitions to fit our core competencies in minerals and fine particle technology.

     However, there can be no assurance that we will achieve success in implementing any one or more of these opportunities.

Results of Operations

Three months ended March 31, 2013 as compared with three months ended April 1, 2012

Sales

(millions of dollars)				FirstQuarter 2013	% of Total Sales		Growth			FirstQuarter 2012	% of Total Sales
Net Sales
U.S			$	139.8	55.6	%	(4)	%	$	145.8	56.7	%
International				111.5	44.4	%	0	%		111.3	43.3	%
	Net sales		$	251.3	100.0	%	(2)	%	$	257.1	100.0	%
Paper PCC			$	121.3	48.3	%	0	%	$	121.7	47.3	%
Specialty PCC				16.8	6.7	%	2	%		16.4	6.4	%
	PCC Products		$	138.1	55.0	%	0	%	$	138.1	53.7	%
Talc			$	12.4	4.9	%	2	%	$	12.1	4.7	%
Ground Calcium Carbonate				17.2	6.8	%	(2)	%		17.5	6.8	%
	Processed Minerals Products		$	29.6	11.7	%	0	%	$	29.6	11.5	%
	Specialty Minerals Segment		$	167.7	66.7	%	0	%	$	167.7	65.2	%
Refractory Products			$	62.4	24.8	%	(10)	%	$	69.1	26.9	%
Metallurgical Products				21.2	8.5	%	4	%		20.3	7.9	%
	Refractories Segment		$	83.6	33.3	%	(6)	%	$	89.4	34.8	%
		Net sales	$	251.3	100.0	%	(2)	%	$	257.1	100.0	%

     Worldwide net sales in the first quarter of 2013 decreased 2% from the previous year to $251.3 million from $257.1 million. Foreign exchange had an unfavorable impact on sales of approximately $2.0 million or one percentage point. Sales in the Specialty Minerals segment, which includes the PCC and Processed Minerals product lines, were flat at $167.7 million as compared with the prior year.  Sales in the Refractories segment decreased 6% to $83.6 million as compared with $89.4 million in the prior year.

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     Worldwide net sales of PCC, which is primarily used in the manufacturing process of the paper industry, were flat at $138.1 million as compared with the prior year.  Foreign exchange had an unfavorable impact on sales of $1.2 million or approximately one percentage point.  Paper PCC sales were down slightly at $121.3 million in the first quarter of 2013 compared to $121.7 million in the prior year.  Sales growth in Asia related to three new PCC satellites were offset by several paper mill and paper machine shutdowns in North America.Sales of Specialty PCC increased 2% to $16.8 million from $16.4 million in the prior year.  This increase was primarily due to slightly higher volumes and increased pricing.

     Net sales of Processed Minerals products were flat at $29.6 million in the first quarter of 2013 as compared with the prior year.  Talc sales increased 2% to $12.4 million due primarily to higher pricing.

     Net sales in the Refractories segment in the first quarter of 2013 decreased 6% to $83.6 million from $89.4 million in the prior year.  Foreign exchange had an unfavorable impact on sales of approximately $0.8 million or one percentage point.  Sales of refractory products and systems to steel and other industrial applications decreased 10% to $62.4 million from $69.1 million in the prior year due to weak market conditions in North America and Europe, lower equipment sales, and lower sales to non-steel applications.  Sales of metallurgical products within the Refractories segment increased 4% to $21.2 million as compared with $20.3 million in the same period last year, primarily attributable to higher volumes in North America.

     Net sales in the United States decreased 4% to $139.8 million in the first quarter of 2013 from $145.8 million in the prior year.  International sales in the first quarter of 2013 were relatively flat at $111.5 million compared to $111.3 million.

Operating Costs and Expenses (millions of dollars)		First Quarter 2013		First Quarter 2012	Growth
Cost of goods sold	$	196.4	$	202.2	(3)	%
Marketing and administrative	$	22.9	$	22.9	0	%
Research and development	$	4.8	$	5.0	(4)	%

     Cost of goods sold was 78.2% of sales compared with 78.6% of sales in the prior year.  Production margin remained flat at $54.9 million despite a 2% decrease in sales.  In the Specialty Minerals segment, production margin increased $2.2 million, or 6%, on the same level of sales.  This was primarily attributable to improved profitability in Asia of approximately $1.1 million, price increases, net of raw material cost increases, of $1.0 million, and continued productivity and cost improvements of $0.8 million.  This was partially offset by paper mill and paper machine shutdowns of $0.4 million and higher energy costs of $0.4 million.  In the Refractories segment, production margin decreased $2.2 million or 11%.  The decrease in margin was due to reduced Refractory volumes of $1.2 million, lower pricing, partially offset by a reduction in materials costs, of $0.4 million and lower equipment sales of $0.4 million.

     Marketing and administrative costs remained flat at $22.9 million and represented 9.1% of net sales as compared with 8.9% of net sales in the prior year.

     Research and development expenses decreased 4% to $4.8 million from $5.0 million in the prior year and represented 1.9% of net sales as compared with 2.0% of net sales in the prior year.  This decrease was primarily attributable to lower trial activity as compared with prior year.

Income from Operations (millions of dollars)		FirstQuarter 2013		FirstQuarter 2012	Growth
Income from operations	$	27.1	$	27.0	--	%

     The Company recorded income from operations of $27.1 million in the first quarter of 2013 as compared to $27.0 million in the prior year.  Income from operations represented 10.8% of sales in the first quarter of 2013 as compared with 10.5% of sales in the prior year.

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     Income from operations for the Specialty Minerals segment increased 12% to $22.2 million from $19.9 million in the prior year and was 13.2% of net sales as compared with 11.9% in the first quarter of 2012. Operating income for the Refractories segment was $6.9 million, as compared to income from operations of $9.1 million in the prior year, and represented 8.3% net of sales as compared with 10.2% in the prior year.

Non-Operating Income (Deductions) (millions of dollars)		FirstQuarter 2013		FirstQuarter 2012		Growth
Non-operating income (deductions), net	$	0.2	$	(0.6	)	*	%

* Percentage not meaningful

     In the first quarter of 2013, the Company recorded net non-operating income of $0.2 million as compared to net non-operating deductions of ($0.6) million in the prior year.  The change was primarily due to foreign exchange gains of $0.6 million in the current year compared with foreign exchange losses of ($0.4) million in the prior year.

Provision for Taxes on Income (millions of dollars)		FirstQuarter 2013		FirstQuarter 2012	Growth
Provision for taxes on income	$	7.7	$	7.8	(1)	%

     Provision for taxes on income during the first quarter of 2013 was $7.7 million as compared to $7.8 million during the first quarter of 2012.  The effective tax rate for the first quarter 2013 was 28.2% as compared to 29.5% for the first quarter of 2012.  The reduction in the effective tax rate was primarily due to the reinstatement of research and development tax credits from the American Taxpayer Relief Act of 2012.

Consolidated Net Income, net of tax (millions of dollars)		FirstQuarter 2013		FirstQuarter 2012	Growth
Consolidated net income, net of tax	$	19.6	$	18.6	5	%

     The Company recorded consolidated net income, net of tax, of $19.6 million as compared with $18.6 million in the prior year.

Non-controlling Interests (millions of dollars)		FirstQuarter 2013		FirstQuarter 2012	Growth
Non-controlling interests	$	0.8	$	0.6	33	%

     The increase in the income attributable to non-controlling interests is due to higher profitability in our joint ventures.

Net Income attributable to MTI (millions of dollars)		FirstQuarter 2013		FirstQuarter 2012	Growth
Net income attributable to MTI	$	18.8	$	18.0	4	%

     Net income attributable to MTI was $18.8 million in the first quarter of 2013 as compared with income of $18.0 million in the prior year.  Diluted earnings per common share were $0.53 per share in the first quarter of 2013 as compared with $0.51 per share in the prior year.

Liquidity and Capital Resources

     Cash provided from operating activities in the first quarter 2013 was $24.7 million, the same level as the prior year.  Cash flows provided from operations in the first quarter of 2013 were principally used to fund capital expenditures, pay the Company's dividend to common shareholders and to repurchase shares.

20

     Working capital is defined as trade accounts receivable, trade accounts payable and inventories.  Working capital decreased approximately 1% from December 2012.  Total average days of working capital decreased to 55 days in the first quarter of 2013 from 59 days in the fourth quarter of 2012.  This decrease was primarily attributable to an increase in days payable outstanding.

     In 2011, the Company's Board of Directors authorized the Company's management to repurchase, at its discretion, up to $75 million of the Company's shares over a two-year period. As of March 31, 2013, 861,825 shares have been repurchased under this program for $40.1 million.

          The Company had $191 million in uncommitted short-term bank credit lines, of which $7.2 million were in use at March 31, 2013.  The credit lines are primarily in the US, with approximately $21 million or 11% outside the US.  The credit lines are generally one year in term at competitive market rates at large well- established institutions.  The Company typically uses its available credit lines to fund working capital requirement or local capital spending needs. We anticipate that capital expenditures for 2013 should be between $60 million and $75 million, principally related to the construction of PCC plants and other opportunities that meet our strategic growth objectives. We expect to meet our other long-term financing requirements from internally generated funds, uncommitted bank credit lines and, where appropriate, project financing of certain satellite plants.  The aggregate maturities of long-term debt are as follows:  remainder of  2013 - $77.0 million; 2014 - $8.5 million; 2015 - $-- million; 2016 - $-- million; 2017 - $-- million thereafter - $-- million.

     The Company's debt to capital ratio is 10.2%, which is below the only financial covenant ratio in its debt agreements.

Cautionary Statement for "Safe Harbor" Purposes under the Private Securities Litigation Reform Act of 1995

The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements made by or on behalf of the Company. This report contains statements that the Company believes may be "forward-looking statements" within the meaning of Section 21E of the Securities Exchange Act of 1934, particularly statements relating to the Company's objectives, plans or goals, future actions, future performance or results of current and anticipated products, sales efforts, expenditures, and financial results.  From time to time, the Company also provides forward-looking statements in other publicly-released materials, both written and oral.  Forward-looking statements provide current expectations and forecasts of future events such as new products, revenues and financial performance, and are not limited to describing historical or current facts.  They can be identified by the use of words such as "believes," "expects," "plans," "intends," "anticipates," and other words and phrases of similar meaning.

     Forward-looking statements are necessarily based on assumptions, estimates and limited information available at the time they are made.  A broad variety of risks and uncertainties, both known and unknown, as well as the inaccuracy of assumptions and estimates, can affect the realization of the expectations or forecasts in these statements.  Many of these risks and uncertainties are difficult to predict or are beyond the Company's control.  Consequently, no forward-looking statement can be guaranteed.  Actual future results may vary materially.  Significant factors affecting the expectations and forecasts are set forth under "Item 1A — Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2012, and in Exhibit 99 to this Quarterly Report on Form 10-Q.

     The Company undertakes no obligation to update any forward-looking statements to reflect events or circumstances that arise after the date hereof. Investors should refer to the Company's subsequent filings under the Securities Exchange Act of 1934 for further disclosures.

Recently Issued Accounting Standards

     Changes to accounting principles generally accepted in the United States of America (U.S. GAAP) are established by the Financial Accounting Standards Board (FASB) in the form of accounting standards updates (ASUs) to the FASB's Accounting Standards Codification.

21

     The Company considers the applicability and impact of all ASUs. ASUs not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on our consolidated financial position and results of operations.

     In June 2011, the FASB issued amendments to disclosure requirements for presentation of comprehensive income. This guidance, effective retrospectively for the interim and annual periods beginning on or after December 15, 2011 (early adoption was permitted), requires presentation of total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements. In December 2011, the FASB issued an amendment to defer the presentation on the face of the financial statements the effects of reclassifications out of accumulated other comprehensive income on the components of net income and other comprehensive income for annual and interim financial statements. The implementation of the amended accounting guidance has not had a material impact on our consolidated financial position or results of operations. In February 2013, the FASB issued amendments to disclosure requirements for presentation of comprehensive income. The standard requires presentation (either in a single note or parenthetically on the face of the financial statements) of the effect of significant amounts reclassified from each component of accumulated other comprehensive income based on its source and the income statement line items affected by the reclassification. If a component is not required to be reclassified to net income in its entirety, a cross reference to the related footnote for additional information will be required. The amendments are effective prospectively for reporting periods beginning after December 15, 2012 (early adoption was permitted). The Company adopted this guidance effective January 1, 2013. The implementation of the amended accounting guidance did not have a material impact on our consolidated financial position or results of operations.

          In July 2012, the FASB issued amendments to the indefinite-lived intangible asset impairment guidance which provides an option for companies to use a qualitative approach to test indefinite-lived intangible assets for impairment if certain conditions are met. The amendments are effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012 (early adoption is permitted). The Company adopted this guidance effective January 1, 2013.  The Company does not have any indefinite-lived intangible assets; therefore, the implementation of the amended accounting guidance did not have any impact on our consolidated financial position or results of operations.

Critical Accounting Policies

     Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles.  The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities.

     On an ongoing basis, we evaluate our estimates and assumptions, including those related to revenue recognition, allowance for doubtful accounts, valuation of inventories, valuation of long-lived assets, pension plan assumptions, stock-based compensation assumptions, income taxes, income tax valuation allowances and litigation and environmental liabilities.  We base our estimates on historical experience and on other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that can not readily be determined from other sources.  There can be no assurance that actual results will not differ from those estimates.

ITEM 3.  Quantitative and Qualitative Disclosures about Market Risk

     Market risk represents the risk of loss that may impact our financial position, results of operations or cash flows due to adverse changes in market prices and foreign currency and interest rates.  We are exposed to market risk because of changes in foreign currency exchange rates as measured against the U.S. dollar.  We do not anticipate that near-term changes in exchange rates will have a material impact on our future earnings or cash flows.  However, there can be no assurance that a sudden and significant decline in the value of foreign currencies would not have a material adverse effect on our financial condition and results of operations.  Approximately 45% of our bank debt bears interest at variable rates; therefore our results of operations would only be affected by interest rate changes to such outstanding bank debt.  An immediate 10 percent change in interest rates would not have a material effect on our results of operations over the next fiscal year.     

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     We do not enter into derivatives or other financial instruments for trading or speculative purposes.  When appropriate, we enter into derivative financial instruments, such as forward exchange contracts, hedges and interest rate swaps, to mitigate the impact of foreign exchange rate movements and interest rate movements on our operating results.  The counterparties are major financial institutions.  Such forward exchange contracts, hedges and interest rate swaps would not subject us to additional risk from exchange rate or interest rate movements because gains and losses on these contracts would offset losses and gains on the assets, liabilities, and transactions being hedged.

     We had open forward exchange contracts to purchase approximately $1.9 million of foreign currencies as of March 31, 2013. The contracts mature between April 2013 and July 2013.  The fair value of these instruments at March 31, 2013 was a liability of less than $0.1 million.

     The Company has open foreign exchange contracts to sell 15 million Euros as a hedge of its net investment in Europe. These contracts mature in October 2013. The fair value of these instruments at March 31, 2013 was an asset of $4.1 million.

ITEM 4.  Controls and Procedures

Evaluation of Disclosure Controls and Procedures

      As of the end of the period covered by this report, and under the supervision and with participation of the Company's management, including the Chief Executive Officer and the Chief Financial Officer, the Company carried out an evaluation of the effectiveness of the design and operation of the Company's disclosure controls and procedures, pursuant to Exchange Act Rule 13a-15(b).  Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company's disclosure controls and procedures were effective as of March 31, 2013.

Changes in Internal Control Over Financial Reporting

     There was no change in the Company's internal control over financial reporting during the quarter ended March 31, 2013  that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

PART II.  OTHER INFORMATION

ITEM 1.  Legal Proceedings

Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials.  The Company currently has 72 pending silica cases and 10 pending asbestos cases. To date, 1,394 silica cases and 33 asbestos cases have been dismissed. Four new asbestos cases were filed in the first quarter of 2013, and one was dismissed.  Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any.  Additional claims of this nature may be made against the Company or its subsidiaries.  At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations.

     The Company has not settled any silica or asbestos lawsuits to date.  We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage.  The aggregate cost to the Company for the legal defense of these cases since inception was approximately $0.2 million, the majority of which has been reimbursed by Pfizer Inc pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. Of the 10 pending asbestos cases, all allege liability based on products sold largely or entirely prior to the initial public offering, and for which the Company is therefore entitled to indemnification pursuant to such agreements. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits.

Environmental Matters

        On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals

23

segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination. We are now conducting a site-specific risk assessment required by the regulators.

We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Though the cost of the likely remediation remains uncertain pending completion of the phased remediation decision process, we have estimated that the Company's share of the cost of the encapsulation and limited soil removal described above would approximate $0.4 million, which has been accrued as of March 31, 2013.

     The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection ("DEP") on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010.  The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater.  Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of March 31, 2013.

     The Company and its subsidiaries are not party to any other material pending legal proceedings, other than routine litigation incidental to their businesses.

ITEM 1A.  Risk Factors

     There have been no material changes to our risk factors from those disclosed in our 2012 Annual Report on Form 10-K. For a description of Risk Factors, see Exhibit 99 attached to this report.

ITEM 2.  Unregistered Sales of Equity Securities and Use of Proceeds

     Issuer Purchases of Equity Securities

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of the Publicly Announced Program	Dollar Value of Shares that May Yet be Purchased Under the Program
January 1 – January 27	--	$	--	633,575	$	44,347,948
January 28 – February 24	17,900		40.53	651,475		43,622.389
February 25 – March 31	210,350		41.46	861,825	$	34,900,300
Total	228,250	$	41.39

     In 2011, the Company's Board of Directors authorized the Company's management to repurchase, at its discretion, up to $75 million of the Company's shares over a two-year period. As of March 31, 2013, 861,825 shares have been repurchased under this program for $40.1 million.

ITEM 3.  Default Upon Senior Securities

     Not applicable.

ITEM 4.  Mine Safety Disclosures

     The information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K is included in Exhibit 95 to this Quarterly Report on Form 10-Q.

24

ITEM 5.  Other Information

     None

ITEM 6.  Exhibits

Exhibit No.	Exhibit Title
10.1	Third Amendment to Employment Agreement, dated February 21, 2013, by and betweenJoseph C. Muscari and the Company (incorporated by reference to the Exhibit 10.1 filed with the Company's Current Report on form 8-K filed on February 21, 2013)
10.2	Employment Agreement, dated February 4, 2013, between the Company and Robert S. Wetherbee (incorporated by reference to the Exhibit 10.1 filed with the Company's Current Report on form 8-K filed on March 4, 2013)
10.3	Form of Amendment to the Company's Standard Form of Severance Agreement (incorporated by reference to the Exhibit 10.1 filed with the Company's Current Report on form 8-K filed on March 25, 2013)
15	Letter Regarding Unaudited Interim Financial Information.
31.1	Rule 13a-14(a)/15d-14(a) Certification executed by the Company's principal executive officer.
31.2	Rule 13a-14(a)/15d-14(a) Certification executed by the Company's principal financial officer.
32	Section 1350 Certifications.
95	Information concerning Mine Safety Violations
99	Risk Factors
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

25

SIGNATURE

          Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Minerals Technologies Inc.
By:	/s/Douglas T. Dietrich
	Douglas T. Dietrich
	Senior Vice President-Finance and Treasury,
	Chief Financial Officer
	(principal financial officer)

April 26, 2013

26

Exhibit Index

The following documents are filed as part of this report:

15	Letter Regarding Unaudited Interim Financial Information.
31.1	Rule 13a-14(a)/15d-14(a) Certification executed by the Company's principal executive officer.
31.2	Rule 13a-14(a)/15d-14(a) Certification executed by the Company's principal financial officer.
32	Section 1350 Certifications.
95	Information concerning Mine Safety Violations
99	Risk Factors
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema
101.CAL	XBRL Taxonomy Extension Calculation Linkbase
101.DEF	XBRL Taxonomy Extension Definition Linkbase
101.LAB	XBRL Taxonomy Extension Label Linkbase
101.PRE	XBRL Taxonomy Extension Presentation Linkbase

EX-15

EXHIBIT 15

ACCOUNTANTS' ACKNOWLEDGEMENT

Board of Directors Minerals Technologies Inc.:

Re:  Registration Statement Nos. 333-160002, 33-59080, 333-62739 and 333-138245

        With respect to the subject registration statements, we acknowledge our awareness of the use therein of our report dated April 26, 2013, related to our review of interim financial information.

        Pursuant to Rule 436 under the Securities Act of 1933, such report is not considered a part of a registration statement prepared or certified by an independent registered public accounting firm, or a report prepared or certified by an independent registered public accounting firm within the meaning of Sections 7 and 11 of the Act.

/s/ KPMG LLP

New York, New York April 26, 2013

EX-31.1

EXHIBIT 31.1

RULE 13a-14(a)/15d-14(a) CERTIFICATION

I, Joseph C. Muscari, certify that:

1.	I have reviewed this Quarterly Report on Form 10-Q of Minerals Technologies Inc.;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
		(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
		(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
		(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
		(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter ( the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and
5.	The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors:
		(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and
		(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 26, 2013

By:	/s/Joseph C. Muscari
	Joseph C. Muscari
	Executive Chairman

EX-31.2

EXHIBIT 31.2

RULE 13a-14(a)/15d-14(a) CERTIFICATION

I, Douglas T. Dietrich, certify that:

1.	I have reviewed this Quarterly Report on Form 10-Q of Minerals Technologies Inc.;
2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.	The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
		(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
		(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
		(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
		(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter ( the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and
5.	The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors:
		(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and
		(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 26, 2013

By:	/s/Douglas T. Dietrich
	Douglas T. Dietrich
	Senior Vice President-Finance and Treasury,
	Chief Financial Officer
	(principal financial officer)

EX-32

EXHIBIT 32

SECTION 1350 CERTIFICATIONS

       Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350 of Chapter 63 of Title 18, United States Code), each of the undersigned officers of Minerals Technologies Inc., a Delaware corporation (the "Company"), does hereby certify that:

       The Quarterly Report on Form 10-Q for the quarter ended March 31, 2013 (the "Form 10-Q") of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:  April 26, 2013

By:	/s/Joseph C. Muscari
	Joseph C. Muscari
	Executive Chairman

Date:  April 26, 2013

By:	/s/Douglas T. Dietrich
	Douglas T. Dietrich
	Senior Vice President-Finance and Treasury,
	Chief Financial Officer
	(principal financial officer)

       The foregoing certification is being furnished solely pursuant to Exchange Act Rule 13a-14(b); is not deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section; and is not deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act of 1934.

EX-95

EXHIBIT 95

Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K contain certain reporting requirements regarding coal or other mine safety.  The Company, through its subsidiaries Specialty Minerals Inc. and Barretts Minerals Inc., operates six mines in the United States.  The operation of our mines is subject to regulation by the federal Mine Safety and Health Administration ("MSHA") under the Federal Mine Safety and Health Act of 1977 (the "Mine Act").  MSHA inspects our mines on a regular basis and issues various citations and orders when it believes a violation has occurred under the Mine Act.

The following table sets forth the required information with respect to each mine for which we are the operator for the period January 1, 2013 to March 31, 2013 (number of occurrences, except for proposed assessment dollar values):

Mine	Section 104(a) S&S	Section 104(b)	Section 104(d)	Section 110(b)(2)	Section 107(a)	Proposed Assessments	Fatalities
	(A)	(B)	(C)	(D)	(E)	(F)	(G)
Lucerne Valley, CA	2	0	0	0	0	*	0
Canaan, CT	0	0	0	0	0	$0	0
Adams, MA	0	0	0	0	0	*	0
Barretts Mill, Dillon, MT	0	0	0	0	0	*	0
Regal Mine, Dillon, MT	0	0	0	0	0	$0	0
Treasure Mine, Dillon, MT	0	0	0	0	0	$0	0

   * As of the date of this report, we have not received proposed assessments for certain violations issued during this period for this location

(A) The total number of violations of mandatory health or safety standards that could significantly and substantially contribute to the cause and effect of a mine safety or health hazard under section 104 of the Mine Act for which we received a citation from MSHA.

(B) The total number of orders issued under section 104(b) of the Mine Act.

(C) The total number of citations and orders for unwarrantable failure of the Company to comply with mandatory health or safety standards under section 104(d) of the Mine Act.

(D) The total number of flagrant violations under section 110(b)(2) of the Mine Act.

(E) The total number of imminent danger orders issued under section 107(a) of the Mine Act.

(F) The total dollar value of proposed assessments from MSHA under the Mine Act.

(G) The total number of mining-related fatalities, other than fatalities determined by MSHA to be unrelated to mining activity.

During the period January 1, 2013 to March 31, 2013, we did not receive any written notice from MSHA, with respect to any mine for which we are the operator, of (A) a pattern of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of mine health and safety hazards under section 104(e) of the Mine Act or (B) the potential to have such a pattern.

The following table sets forth the required information with respect to legal actions before the Federal Mine Safety and Health Review Commission involving each mine for which we are the operator for the period January 1, 2013 to March 31, 2013 (number of actions):

Mine	Legal Actions Pending As Of Last Day Of Period (1)	Legal Actions Initiated During Period	Legal Actions Resolved During Period
Lucerne Valley, CA	0	0	0
Canaan, CT	0	0	0
Adams, MA	3	0	0
Barretts Mill, Dillon, MT	3	0	0
Regal Mine, Dillon, MT	0	0	0
Treasure Mine, Dillon, MT	0	0	0

(1) Each legal action pending as of the last day of the period is a contest of citations and orders, as referenced in Subpart B of 29 CFR Part 2700.  For each such legal action, we have requested, in the alternative, a reduction of the proposed penalties, as referenced in Subpart C of 29 CFR Part 2700.

EX-99

EXHIBIT 99

RISK FACTORS

          Our business faces significant risks. These risks include those described below and may include additional risks and uncertainties not presently known to us.  Our business, financial condition and results of operations could be materially adversely affected by any of these risks. These risks should be read in conjunction with the other information in the Company's Annual Report on Form 10-K for the year ended December 31, 2012, and this Quarterly Report on Form 10-Q.

·	Worldwide general economic, business, and industry conditions have had, and may continue to have, an adverse effect on the Company's results.
	The global economic instability of the past few years has caused, among other things, declining consumer and business confidence, volatile raw material prices, instability in credit markets, high unemployment, fluctuating interest and exchange rates, and other challenges.  The Company's business and operating results have been and may continue to be adversely affected by these global economic conditions.  In particular, our operations in Europe continue to be impacted by the uncertain European economy.  A currency or financial crisis in Europe could precipitate a significant decline in the European economy, which would likely result in a decrease in demand for our products in Europe.   The Company's customers and potential customers may experience deterioration of their businesses, cash flow shortages, and difficulty obtaining financing.  As discussed below, the industries we serve, primarily paper, steel, construction and automotive, have been particularly adversely affected by the uncertain global economic climate due to the cyclical nature of their businesses.  As a result, existing or potential customers may reduce or delay their growth and investments and their plans to purchase products, and may not be able to fulfill their obligations in a timely fashion.  Further, suppliers could experience similar conditions, which could affect their ability to fulfill their obligations to the Company.  Adversity within capital markets may also impact the Company's results of operations by negatively affecting the amount of expense the Company records for its pension and other postretirement benefit plans. Actuarial valuations used to calculate income or expense for the plans reflect assumptions about financial market and other economic conditions – the most significant of which are the discount rate and the expected long-term rate of return on plan assets.  Such actuarial valuations may change based on changes in key economic indicators. Global economic markets remain uncertain, and there can be no assurance that market conditions will improve in the near future.  Future weakness in the global economy could materially and adversely affect our business and operating results.
·	The Company's operations are subject to the cyclical nature of its customers' businesses and we may not be able to mitigate that risk.
	The majority of the Company's sales are to customers in industries that have historically been cyclical: paper, steel, construction, and automotive. These industries have been particularly adversely affected by the uncertain global economic climate.  Our Refractories segment primarily serves the steel industry.  In 2012, North American and European steel production was approximately 15% below 2008 levels due to reduced demand and several steel mill closures.  In the paper industry, which is served by our Paper PCC product line, production levels for uncoated freesheet within North America and Europe, our two largest markets remain approximately 16%below 2008 levels.  The reduced demand for paper industry products has also caused the paper industry to experience a number of bankruptcies and paper mill closures, including among our customers.  In addition, our Processed Minerals and Specialty PCC product lines are affected by the domestic building and construction markets and the automotive market. Housing starts in 2012 averaged approximately 781 thousand units.  Housing starts were at a peak rate of 2.1 million units in 2005.  Demand for our products is subject to these trends. In addition, these trends could cause our customers to face liquidity issues or bankruptcy, which could deteriorate the aging of our accounts receivable, increase our bad debt exposure and possibly trigger impairment of assets or realignment of our businesses. The Company has taken steps to reduce its exposure to variations in its customers' businesses, including by diversifying its portfolio of products and services; through geographic expansion, and by structuring most of its long-term satellite PCC contracts to provide a degree of protection against declines in the quantity of product purchased, since the price per ton of PCC generally rises as the number of tons purchased declines.  In addition, many of the Company's product lines lower its customers' costs of production or increase their productivity, which should encourage them to use its products.  However, there can be no assurance that these efforts will mitigate the risks of our dependence on these industries.  Continued weakness in the industries we serve has had, and may in the future have, an adverse effect on sales of our products and our results of operations.  A continued or renewed economic downturn in one or more of the industries or geographic regions that the Company serves, or in the worldwide economy, could cause actual results of operations to differ materially from historical and expected results.
·	The Company's results could be adversely affected if it is unable to effectively achieve and implement its growth initiatives.
	Sales and income growth of the Company depends upon a number of uncertain events, including the outcome of the Company's strategies of increasing its penetration into geographic markets such as the BRIC (Brazil, Russia, India, China) countries and other Asian and Eastern European countries; increasing its penetration into product markets such as the market for papercoating pigments and the market for groundwood paper pigments; increasing sales to existing PCC customers by increasing the amount of PCC used per ton of paper produced; developing, introducing and selling new products such as the FulFillTM family of products for the paper industry.  Difficulties, delays or failure of any of these strategies could affect the future growth rate of the Company.  Our strategy also anticipates growth through future acquisitions.  However, our ability to identify and consummate any future acquisitions on terms that are favorable to us may be limited by the number of attractive acquisition targets, internal demands on our resources and our ability to obtain financing.  Our success in integrating newly acquired businesses will depend upon our ability to retain key personnel, avoid diversion of management's attention from operational matters, and integrate general and administrative services.  In addition, future acquisitions could result in the incurrence of additional debt, costs and contingent liabilities. Integration of acquired operations may take longer, or be more costly or disruptive to our business, than originally anticipated, and it is also possible that expected synergies from future acquisitions may not materialize.  We also may incur costs and divert management attention with regard to potential acquisitions that are never consummated.
·	The Company's sales of PCC could be adversely affected by our failure to renew or extend long term sales contracts for our satellite operations.
	The Company's sales of PCC to paper customers are typically pursuant to long-term evergreen agreements, initially ten years in length, with paper mills where the Company operates satellite PCC plants.  Sales pursuant to these contracts represent a significant portion of our worldwide Paper PCC sales, which were $480.3 million in 2012, or approximately 48% of the Company's net sales.  The terms of many of these agreements have been extended or renewed in the past, often in connection with an expansion of the satellite plant.  However, failure of a number of the Company's customers to renew or extend existing agreements on terms as favorable to the Company as those currently in effect, or at all, could have a substantial adverse effect on the Company's results of operations, and could also result in impairment of the assets associated with the PCC plant.
·	The Company's sales could be adversely affected by consolidation in customer industries, principally paper and steel.
	Several consolidations in the paper industry have taken place in recent years and such consolidation could continue in the future. These consolidations could result in partial or total closure of some paper mills where the Company operates PCC satellites. Such closures would reduce the Company's sales of PCC, except to the extent that they resulted in shifting paper production and associated purchases of PCC to another location served by the Company. Similarly, consolidations have occurred in the steel industry.  Such consolidations in the two major industries we serve concentrate purchasing power in the hands of a smaller number of papermakers and steel manufacturers, enabling them to increase pressure on suppliers, such as the Company.  This increased pressure could have an adverse effect on the Company's results of operations in the future.
·	The Company is subject to stringent regulation in the areas of environmental, health and safety, and tax, and may incur unanticipated costs or liabilities arising out of claims for various legal, environmental and tax matters or product stewardship issues.
	The Company's operations are subject to international, federal, state and local governmental environmental, health and safety, tax and other laws and regulations.  We have expended, and may be required to expend in the future, substantial funds for compliance with such laws and regulations.  In addition, future events, such as changes to or modifications of interpretations of existing laws and regulations, or enforcement polices, or further investigation or evaluation of the potential environmental impacts of operations or health hazards of certain products, may give rise to additional compliance and other costs that could have a material adverse effect on the Company.  State, national, and international governments and agencies have been evaluating climate-related legislation and regulation that would restrict emissions of greenhouse gases in areas in which we conduct business, and some such legislation and regulation have already been enacted or adopted.  Enactment of climate-related legislation or adoption of regulation that restrict emissions of greenhouse gases in areas in which we conduct business could have an adverse effect on our operations or demand for our products.  Our manufacturing processes, particularly the manufacturing process for PCC, use a significant amount of energy and, should energy prices increase as a result of such legislation or regulation, we may not be able to pass these increased costs on to purchasers of our products.  We cannot predict if or when currently proposed or additional laws and regulations regarding climate change or other environmental or health and safety concerns will be enacted or adopted.  Moreover, changes in tax regulation and international tax treaties could reduce the financial performance of our foreign operations. The Company is currently a party in various litigation matters and tax and environmental proceedings and faces risks arising from various unasserted litigation matters, including, but not limited to, product liability, patent infringement, antitrust claims, and claims for third party property damage or personal injury stemming from alleged environmental torts.  Failure to appropriately manage safety, human health, product liability and environmental risks associated with the Company's products and production processes could adversely impact the Company's employees and other stakeholders, the Company's reputation and its results of operations. Public perception of the risks associated with the Company's products and production processes could impact product acceptance and influence the regulatory environment in which the Company operates. While the Company has procedures and controls to manage these risks, carries liability insurance, which it believes to be appropriate to its businesses, and has provided reserves for current matters, which it believes to be adequate, an unanticipated liability, arising out of a current matter or proceeding or from the other risks described above, could have a material adverse effect on the Company's financial condition or results of operations.
·	Delays or failures in new product development could adversely affect the Company's operations.
	The Company's future business success will depend in part upon its ability to maintain and enhance its technological capabilities, to respond to changing customer needs, and to successfully anticipate or respond to technological changes on a cost-effective and timely basis.  The Company is engaged in a continuous effort to develop new products and processes in all of its product lines.  Difficulties, delays or failures in the development, testing, production, marketing or sale of such new products could cause actual results of operations to differ materially from our expected results.
·	The Company's ability to compete is dependent upon its ability to defend its intellectual property against inappropriate disclosure and infringement.
	The Company's ability to compete is based in part upon proprietary knowledge, both patented and unpatented.  The Company's ability to achieve anticipated results depends in part on its ability to defend its intellectual property against inappropriate disclosure as well as against infringement.  In addition, development by the Company's competitors of new products or technologies that are more effective or less expensive than those the Company offers could have a material adverse effect on the Company's financial condition or results of operations.
·	The Company's operations could be impacted by the increased risks of doing business abroad.
	The Company does business in many areas internationally.  Approximately 44% of our sales in 2012 were derived from outside the United States and we have significant production facilities which are located outside of the United States.  We continue to be concerned about the possibility of recessionary conditions in Europe, from which we derived approximately 25% of our sales in 2012. Our sales in Europe decreased from $298.4 million in 2011 to $257.0 million in 2012, and continued weakness in the European market may negatively affect our sales in the future.  We have in recent years expanded our operations in emerging markets, and we plan to continue to do so in the future, particularly in China, India, Brazil, and Eastern Europe.  Some of our operations are located in areas that have experienced political or economic instability, including Indonesia, Brazil, Thailand, China and South Africa.  As the Company expands its operations overseas, it faces increased risks of doing business abroad, including inflation, fluctuation in interest rates, changes in applicable laws and regulatory requirements, export and import restrictions, tariffs, nationalization, expropriation, limits on repatriation of funds, civil unrest, terrorism, unstable governments and legal systems, and other factors.  Adverse developments in any of the areas in which we do business could cause actual results to differ materially from historical and expected results.  In addition, a significant portion of our raw material purchases and sales outside the United States are denominated in foreign currencies, and liabilities for non-U.S. operating expenses and income taxes are denominated in local currencies.   Accordingly, reported sales, net earnings, cash flows and fair values have been and in the future will be affected by changes in foreign currency exchange rates.  Our overall success as a global business depends, in part, upon our ability to succeed in differing legal, regulatory, economic, social and political conditions.  We cannot assure you that we will implement policies and strategies that will be effective in each location where we do business.
·	The Company's operations are dependent on the availability of raw materials and increases in costs of raw materials or energy could adversely affect our financial results.
	The Company depends in part on having an adequate supply of raw materials for its manufacturing operations, particularly lime and carbon dioxide for the PCC product line, and magnesia and alumina for its Refractory operations. Purchase prices and availability of these critical raw materials are subject to volatility.  At any given time, we may be unable to obtain an adequate supply of these critical raw materials on a timely basis, on price and other terms, or at all. While most such raw materials are readily available, the Company purchases a portion of its magnesia requirements from sources in China.  The price and availability of magnesia have fluctuated in the past and they may fluctuate in the future.  Price increases for certain other of our raw materials, as well as increases in energy prices, have also affected our business. Our ability to recover increased costs is uncertain.  The Company and its customers will typically negotiate reasonable price adjustments in order to recover a portion of these rapidly escalating costs.  While the contracts pursuant to which we construct and operate our satellite PCC plants generally adjust pricing to reflect increases in costs resulting from inflation, there is a time lag before such price adjustments can be implemented. The Company also depends on having adequate access to ore reserves of appropriate quality at its mining operations. There are numerous uncertainties inherent in estimating ore reserves including subjective judgments and determinations that are based on available geological, technical, contract and economic information. We cannot predict whether, and how much, prices for our key raw materials will increase in the future.  Changes in the costs or availability of such raw materials, to the extent we cannot recover them in price increases to our customers, could adversely affect the Company's results of operations.
·	The Company operates in very competitive industries, which could adversely affect our profitability.
	The Company has many competitors. Some of our principal competitors have greater financial and other resources than we have.  Accordingly, these competitors may be better able to withstand changes in conditions within the industries in which we operate and may have significantly greater operating and financial flexibility than we do.  As a result of the competitive environment in the markets in which we operate, we currently face and will continue to face pressure on the sales prices of our products from competitors, which could reduce profit margins.
·	Production facilities are subject to operating risks and capacity limitations that may adversely affect the Company's financial condition or results of operations.
	The Company is dependent on the continued operation of its production facilities. Production facilities are subject to hazards associated with the manufacturing, handling, storage, and transportation of chemical materials and products, including pipeline leaks and ruptures, explosions, fires, inclement weather and natural disasters, mechanical failure, unscheduled downtime, labor difficulties, transportation interruptions, and environmental risks. We maintain property, business interruption and casualty insurance but such insurance may not cover all risks associated with the hazards of our business and is subject to limitations, including deductibles and maximum liabilities covered.  We may incur losses beyond the limits, or outside the coverage, of our insurance policies.  Further, from time to time, we may experience capacity limitations in our manufacturing operations. In addition, if we are unable to effectively forecast our customers' demand, it could affect our ability to successfully manage operating capacity limitations. These hazards, limitations, disruptions in supply and capacity constraints could adversely affect financial results.

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Accounting for Asset Retirement Obligations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accounting for Asset Retirement Obligations [Abstract]
Asset retirement liability, beginning balance	$ 15.0
Accretion expense	0.2
Additional obligations	0.1
Reversal of obligation	(0.3)
Foreign currency translation	(0.1)
Asset retirement liability, ending balance	14.9
Asset retirement obligation current portion	0.4
Asset retirement obligation noncurrent portion	$ 14.5

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Income Taxes [Abstract]
Amount of unrecognized tax benefits	$ 5.0
Unrecognized tax benefits that would impact effective tax rate	3.3
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	0.1
Unrecognized tax benefits, accrued interest and penalties	$ 1.1

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Long-Term Debt and Commitments (Tables)

3 Months Ended

Mar. 31, 2013

Long-Term Debt and Commitments [Abstract]

Summary of long-term debt

     The following is a summary of long-term debt:

(millions of dollars)			March 31,2013		December 31,2012
5.53% Series 2006A Senior Notes
	Due October 5, 2013		$	50.0	$	50.0
Floating Rate Series 2006A Senior Notes
	Due October 5, 2013			25.0		25.0
Variable/Fixed Rate Industrial
	Development Revenue Bonds Series 1999 Due November 1, 2014			8.2		8.2
Installment obligations				1.4		1.4
Other borrowings				0.9		0.9
		Total		85.5		85.5
Less: Current maturities				77.3		77.0
Long-term debt			$	8.2	$	8.5

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Noncontrolling interests (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Balance	$ 813,719,000
Consolidated net income	19,604,000	18,608,000
Other Comprehensive Income	(12,500,000)
Dividends declared	(1,800,000)
Dividends paid to non-controlling interest	(486,000)	0
Employee benefit transactions	2,700,000
Income tax benefit arising from employee stock option	700,000
Purchase of common stock	(9,400,000)
Stock based compensation	200,000
Balance	812,759,000
Common Stock [Member]
Balance	4,700,000
Consolidated net income	0
Other Comprehensive Income	0
Dividends declared	0
Dividends paid to non-controlling interest	0
Employee benefit transactions	0
Income tax benefit arising from employee stock option	0
Purchase of common stock	0
Stock based compensation	0
Balance	4,700,000
Additional Paid-in Capital [Member]
Balance	345,900,000
Consolidated net income	0
Other Comprehensive Income	0
Dividends declared	0
Dividends paid to non-controlling interest	0
Employee benefit transactions	2,700,000
Income tax benefit arising from employee stock option	700,000
Purchase of common stock	0
Stock based compensation	200,000
Balance	349,500,000
Retained Earnings [Member]
Balance	1,032,900,000
Consolidated net income	18,800,000
Other Comprehensive Income	0
Dividends declared	(1,800,000)
Dividends paid to non-controlling interest	0
Employee benefit transactions	0
Income tax benefit arising from employee stock option	0
Purchase of common stock	0
Stock based compensation	0
Balance	1,049,900,000
Accumulated Other Comprehensive Income (Loss) [Member]
Balance	(51,200,000)
Consolidated net income	0
Other Comprehensive Income	(12,000,000)
Dividends declared	0
Dividends paid to non-controlling interest	0
Employee benefit transactions	0
Income tax benefit arising from employee stock option	0
Purchase of common stock	0
Stock based compensation	0
Balance	(63,200,000)
Treasury Stock [Member]
Balance	(541,900,000)
Consolidated net income	0
Other Comprehensive Income	0
Dividends declared	0
Dividends paid to non-controlling interest	0
Employee benefit transactions	0
Income tax benefit arising from employee stock option	0
Purchase of common stock	(9,400,000)
Stock based compensation	0
Balance	(551,300,000)
Noncontrolling Interest [Member]
Balance	23,300,000
Consolidated net income	900,000
Other Comprehensive Income	(500,000)
Dividends declared	0
Dividends paid to non-controlling interest	(500,000)
Employee benefit transactions	0
Income tax benefit arising from employee stock option	0
Purchase of common stock	0
Stock based compensation	0
Balance	$ 23,200,000

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Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Employer Contributions [Abstract]
Maximum percentage of total benefit obligation for international pension plans (in hundredths)	25.00%
Pension Plans, Defined Benefit [Member]
Components of Net Periodic Benefit Cost [Abstract]
Service cost	$ 2.3	$ 2.3
Interest cost	2.8	2.9
Expected return on plan assets	(3.7)	(3.5)
Amortization [Abstract]
Prior service cost	0.3	0.3
Recognized net actuarial loss	3.4	3.4
Net periodic benefit cost	5.1	5.4
Employer Contributions [Abstract]
Expected company contribution to its benefit plans	10.0
Company contribution to benefit plans	0.9
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of Net Periodic Benefit Cost [Abstract]
Service cost	0.2	0.2
Interest cost	0.1	0.1
Expected return on plan assets	0	0
Amortization [Abstract]
Prior service cost	(0.8)	(0.8)
Recognized net actuarial loss	0	0
Net periodic benefit cost	(0.5)	(0.5)
Employer Contributions [Abstract]
Expected company contribution to its benefit plans	1.0
Company contribution to benefit plans	$ 0.2

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Earnings Per Share (EPS)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Earnings Per Share (EPS)

Note 3.  Earnings Per Share (EPS)

     Basic earnings per share are based upon the weighted average number of common shares outstanding during the period.  Diluted earnings per share are based upon the weighted average number of common shares outstanding during the period assuming the issuance of common shares for all potentially dilutive common shares outstanding.

The following table sets forth the computation of basic and diluted earnings per share:

		Three Months Ended
Basic EPS(in millions, except per share amounts)			March 31, 2013		April 1, 2012
	Net income attributable to MTI	$	18.8	$	18.0
Weighted average shares outstanding			35.0		35.4
Basic earnings per share attributable to MTI		$	0.54	$	0.51

		Three Months Ended
Diluted EPS(in millions, except per share amounts)			March 31, 2013		April 1, 2012
	Net income attributable to MTI	$	18.8	$	18.0
Weighted average shares outstanding			35.0		35.4
Dilutive effect of stock options and stock units			0.3		0.2
Weighted average shares outstanding , adjusted		$	35.3	$	35.6
Diluted earnings per share attributable to MTI		$	0.53	$	0.51

     Options to purchase 239,770 and 257,886 shares of common stock for the three-month periods ended March 31, 2013 and April 1, 2012, respectively, were not included in the computation of diluted earnings per share because they were anti-dilutive, as the exercise prices of the options were greater than the average market price of the common shares.

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Segment and Related Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 251,289,000	$ 257,138,000
Income from operations	29,100,000	29,000,000
Goodwill	65,081,000		65,829,000
Income from operations before provision for taxes on income [Abstract]
Income from operations for reportable segments	29,100,000	29,000,000
Unallocated corporate expenses	(2,000,000)	(2,000,000)
Income from operations	27,136,000	26,992,000
Non-operating deductions, net	168,000	(598,000)
Income from continuing operations before provision for taxes	27,304,000	26,394,000
Revenue from External Customer [Line Items]
Net sales	251,289,000	257,138,000
Paper PCC [Member]
Segment Reporting Information [Line Items]
Net sales	121,300,000	121,700,000
Revenue from External Customer [Line Items]
Net sales	121,300,000	121,700,000
Specialty PCC [Member]
Segment Reporting Information [Line Items]
Net sales	16,800,000	16,400,000
Revenue from External Customer [Line Items]
Net sales	16,800,000	16,400,000
Talc [Member]
Segment Reporting Information [Line Items]
Net sales	12,400,000	12,100,000
Revenue from External Customer [Line Items]
Net sales	12,400,000	12,100,000
Ground Calcium Carbonate [Member]
Segment Reporting Information [Line Items]
Net sales	17,200,000	17,500,000
Revenue from External Customer [Line Items]
Net sales	17,200,000	17,500,000
Refractory Products [Member]
Segment Reporting Information [Line Items]
Net sales	62,400,000	69,100,000
Revenue from External Customer [Line Items]
Net sales	62,400,000	69,100,000
Metallurgical Products [Member]
Segment Reporting Information [Line Items]
Net sales	21,200,000	20,300,000
Revenue from External Customer [Line Items]
Net sales	21,200,000	20,300,000
Specialty Minerals [Member]
Segment Reporting Information [Line Items]
Net sales	167,700,000	167,700,000
Income from operations	22,200,000	19,900,000
Goodwill	13,600,000		14,100,000
Income from operations before provision for taxes on income [Abstract]
Income from operations for reportable segments	22,200,000	19,900,000
Revenue from External Customer [Line Items]
Net sales	167,700,000	167,700,000
Refractories [Member]
Segment Reporting Information [Line Items]
Net sales	83,600,000	89,400,000
Income from operations	6,900,000	9,100,000
Goodwill	51,500,000		51,700,000
Income from operations before provision for taxes on income [Abstract]
Income from operations for reportable segments	6,900,000	9,100,000
Revenue from External Customer [Line Items]
Net sales	$ 83,600,000	$ 89,400,000

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Non-Operating Income and Deductions, Net (Tables)

3 Months Ended

Mar. 31, 2013

Non-Operating Deductions, Net [Abstract]

Non-operating Income and Deductions

		Three Months Ended
(millions of dollars)			March 31, 2013			April 1, 2012
	Interest income	$	0.7		$	1.0
	Interest expense		(0.8	)		(0.8	)
	Foreign exchange gains (losses)		0.6			(0.4	)
	Other deductions		(0.3	)		(0.4	)
Non-operating income (deductions), net		$	0.2		$	(0.6	)

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Accounting for Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2013

Accounting for Asset Retirement Obligations [Abstract]

Reconciliation of Asset Retirement Obligations

     The following is a reconciliation of asset retirement obligations as of March 31, 2013:

(millions of dollars)
Asset retirement liability, December 31, 2012	$	15.0
Accretion expense		0.2
Additions		0.1
Reversals		(0.3	)
Foreign currency translation and other		(0.1	)
Asset retirement liability,  March 31, 2013	$	14.9

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Noncontrolling interests (Tables)

3 Months Ended

Mar. 31, 2013

Noncontrolling interests [Abstract]

Total equity, equity attributable To MTI, and equity attributable to noncontrolling interests

     The following is a reconciliation of beginning and ending total equity, equity attributable to MTI, and equity attributable to non-controlling interests:

		Equity Attributable to MTI
(millions of dollars)		Common Stock		Additional Paid-in Capital		RetainedEarnings			AccumulatedOtherComprehensiveIncome (Loss)			Treasury Stock			Non-controlling Interests			Total
Balance as of December 31, 2012		$	4.7	$	345.9	$	1,032.9		$	(51.2	)	$	(541.9	)	$	23.3		$	813.7
Net income			--		--		18.8			--			--			0.9			19.7
Other comprehensive income			--		--		--			(12.0	)		--			(0.5	)		(12.5	)
Dividends declared			--		--		(1.8	)		--			--			--			(1.8	)
Dividends to non-controlling interest			--		--		--			--			--			(0.5	)		(0.5	)
Employee benefit transactions			--		2.7		--			--			--			--			2.7
Income tax benefit arising from employee
	stock option plans		--		0.7		--			--			--			--			0.7
Purchase of common stock for treasury			--		--		--			--			(9.4	)		--			(9.4	)
Stock based compensation			--		0.2		--			--			--			--			0.2
Balance as of March 31, 2013		$	4.7	$	349.5	$	1,049.9		$	(63.2	)	$	(551.3	)	$	23.2		$	812.8

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Segment and Related Information (Tables)

3 Months Ended

Mar. 31, 2013

Segment and Related Information [Abstract]

Segment and Related Information, Net Sales

Net Sales
(millions of dollars)	Three Months Ended
		March 31, 2013		April 1, 2012
Specialty Minerals	$	167.7	$	167.7
Refractories		83.6		89.4
Total	$	251.3	$	257.1

Segment and Related Information, Income From Operations

Income from Operations
(millions of dollars)	Three Months Ended
		March 31, 2013		April 1, 2012
Specialty Minerals	$	22.2	$	19.9
Refractories		6.9		9.1
Total	$	29.1	$	29.0

Segment and Related Information, Goodwill

Goodwill
(millions of dollars)
	Three Months Ended
		March 31, 2013	December 31, 2012
Specialty Minerals	$	13.6	14.1
Refractories		51.5	51.7
Total	$	65.1	65.8

Segment and Related Information, Reconciliation of Operating Income Before Income Taxes

Income from operations before provision for taxes on income:		Three Months Ended
(millions of dollars)			March  31,2013			April 1,  2012
Income from operations for reportable segments		$	29.1		$	29.0
Unallocated corporate expenses			(2.0	)		(2.0	)
Consolidated income from operations			27.1			27.0
Non-operating income (deductions)			0.2			(0.6	)
Income from continuing operations
	before provision for taxes on income	$	27.3		$	26.4

Segment and Related Information, Sales By Product Category

     The Company's sales by product category are as follows:

		Three Months Ended
(millions of dollars)			March 31,2013		April 1, 2012
Paper PCC		$	121.3	$	121.7
Specialty PCC			16.8		16.4
Talc			12.4		12.1
Ground Calcium Carbonate			17.2		17.5
Refractory Products			62.4		69.1
Metallurgical Products			21.2		20.3
	Net sales	$	251.3	$	257.1

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2013

Summary of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Note 2.  Summary of Significant Accounting Policies

     Use of Estimates

     The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, allowance for doubtful accounts, valuation of inventories, valuation of long-lived assets, goodwill and other intangible assets, pension plan assumptions, income tax, income tax valuation allowances, and litigation and environmental liabilities. Actual results could differ from those estimates.

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Earnings Per Share (EPS) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Basic EPS
Net income attributable to MTI	$ 18,756	$ 18,032
Weighted average shares outstanding	34,996,000	35,436,000
Basic earnings per share attributable to MTI	$ 0.54	$ 0.51
Diluted EPS
Net income attributable to MTI	$ 18,756	$ 18,032
Weighted average shares outstanding	34,996,000	35,436,000
Dilutive effect of stock options and stock units	300,000	200,000
Weighted average shares outstanding , adjusted	35,253,000	35,600,000
Diluted earnings per share attributable to MTI	$ 0.53	$ 0.51
Anti-dilutive options not included in the weighted average common shares outstanding calculation	239,770	257,886

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Legal Proceedings (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Loss Contingencies [Line Items]
Claims for products sold prior to initial public offering	10
Aggregate cost of legal defense for pending silica and asbestos cases	$ 0.2
Administrative Consent Order For Contamination Associated with Historic Use of PCBs [Member]
Environmental Matters [Abstract]
Location of plant	Canaan, Connecticut
Estimated accrued remediation cost	0.4
Administrative Consent Order For Installation of Groundwater Contamination System [Member]
Environmental Matters [Abstract]
Location of plant	Adams, Massachusetts
Estimated accrued remediation cost	0.4
Estimated cost of wastewater treatment upgrades, lower range	6
Estimated cost of wastewater treatment upgrades, upper range	$ 8
Asbestos Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	10
Number of new cases filed	4
Number of cases dismissed to date	33
Number of cases dismissed	1
Silica Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	72
Number of cases dismissed to date	1,394

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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
CONDENSED CONSOLIDATED STATEMENTS OF INCOME [Abstract]
Net sales	$ 251,289	$ 257,138
Cost of goods sold	196,401	202,201
Production margin	54,888	54,937
Marketing and administrative expenses	22,934	22,898
Research and development expenses	4,818	5,047
Income from operations	27,136	26,992
Non-operating income (deductions), net	168	(598)
Income from continuing operations before provision for taxes	27,304	26,394
Provision for taxes on income	7,700	7,786
Consolidated net income	19,604	18,608
Less: Net income attributable to non-controlling interests	848	576
Net income attribute to Minerals Technologies Inc. (MTI)	$ 18,756	$ 18,032
Earnings per share:
Basic	$ 0.54	$ 0.51
Diluted	$ 0.53	$ 0.51
Cash dividends declared per common share	$ 0.05	$ 0.025
Shares used in computation of earnings per share:
Basic	34,996	35,436
Diluted	35,253	35,600

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Operating Activities:
Consolidated net income	$ 19,604	$ 18,608
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	11,599	13,026
Payments relating to restructuring activities	0	(620)
Other non-cash items	2,070	1,874
Net changes in operating assets and liabilities	(8,584)	(8,168)
Net cash provided by operating activities	24,689	24,720
Investing Activities:
Purchases of property, plant and equipment	(8,681)	(9,354)
Proceeds from sale of short-term investments	0	1,484
Purchases of short-term investments	(941)	(2,583)
Net cash used in investing activities	(9,622)	(10,453)
Financing Activities:
Net repayment of short-term debt	(81)	(593)
Purchase of common shares for treasury	(7,587)	0
Proceeds from issuance of stock under option plan	2,751	2,084
Cash dividends paid	(1,754)	(887)
Dividends paid to non-controlling interest	(486)	0
Excess tax benefits related to stock incentive programs	184	0
Net cash provided by (used in) financing activities	(6,973)	604
Effect of exchange rate changes on cash and cash equivalents	(7,855)	4,982
Net increase in cash and cash equivalents	239	19,853
Cash and cash equivalents at beginning of period	454,092	395,152
Cash and cash equivalents at end of period	454,331	415,005
Supplemental disclosure of cash flow information:
Interest paid	172	158
Income taxes paid	5,657	10,583
Non-cash financing activities:
Treasury stock purchases settled after period-end	$ 1,860	$ 0

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Goodwill and Other Intangible Assets (Details) (USD $)							3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Patents & Trademarks [Member]	Dec. 31, 2012 Patents & Trademarks [Member]	Mar. 31, 2013 Customer Lists [Member]	Dec. 31, 2012 Customer Lists [Member]	Mar. 31, 2013 Customer Contracts [Member]	Mar. 31, 2013 Acquired Finite-Lived Intangible Assets [Member]
Goodwill [Abstract]
Goodwill	$ 65,081,000	$ 65,829,000
Finite-lived intangible assets [Abstract]
Weighted average amortization period for acquired intangible assets subject to amortization								15
Finite-lived intangible assets, gross, non-current							500,000
Number of PCC satellite facilities							7
Finite-lived intangible assets, gross, current							400,000
Amortization expense							100,000
Estimated amortization expense, 2013							300,000	600,000
Estimated amortization expense, 2014							400,000	400,000
Estimated amortization expense, 2015							100,000	400,000
Estimated amortization expense, 2016								400,000
Estimated amortization expense, 2017								400,000
Estimated amortization expense, 2018								400,000
Acquired Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	8,900,000	8,900,000	6,000,000	6,000,000	2,900,000	2,900,000
Accumulated amortization	$ 5,900,000	$ 5,800,000	$ 3,500,000	$ 3,400,000	$ 2,400,000	$ 2,400,000

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Earnings Per Share (EPS) (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Schedule of basic and diluted earnings per share

The following table sets forth the computation of basic and diluted earnings per share:

		Three Months Ended
Basic EPS(in millions, except per share amounts)			March 31, 2013		April 1, 2012
	Net income attributable to MTI	$	18.8	$	18.0
Weighted average shares outstanding			35.0		35.4
Basic earnings per share attributable to MTI		$	0.54	$	0.51

		Three Months Ended
Diluted EPS(in millions, except per share amounts)			March 31, 2013		April 1, 2012
	Net income attributable to MTI	$	18.8	$	18.0
Weighted average shares outstanding			35.0		35.4
Dilutive effect of stock options and stock units			0.3		0.2
Weighted average shares outstanding , adjusted		$	35.3	$	35.6
Diluted earnings per share attributable to MTI		$	0.53	$	0.51

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Long-Term Debt and Commitments (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long-term debt, gross	$ 85,500,000	$ 85,500,000
Less: Current maturities	77,260,000	76,977,000
Long-term debt	8,200,000	8,478,000
Short-term Borrowings [Abstract]
Uncommitted short-term bank credit lines, maximum borrowing capacity	191,200,000
Uncommitted short-term bank credit lines, amount outstanding	7,226,000	7,111,000
Series 2006 Senior Notes Due 2013 [Member]
Debt Instrument [Line Items]
Long-term debt, gross	50,000,000	50,000,000
Interest rate on debt instrument (in hundredths)	5.53%
Maturity date	Oct. 05, 2013
Floating Rate Series 2006 A Senior Notes Due 2013 [Member]
Debt Instrument [Line Items]
Long-term debt, gross	25,000,000	25,000,000
Maturity date	Oct. 05, 2013
Variable/Fixed Rate Industrial Development Revenue Bonds Series 1999 Due 2014 [Member]
Debt Instrument [Line Items]
Long-term debt, gross	8,200,000	8,200,000
Maturity date	Nov. 01, 2014
Installment Obligations [Member]
Debt Instrument [Line Items]
Long-term debt, gross	1,400,000	1,400,000
Other Borrowings [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 900,000	$ 900,000

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Goodwill and Other Intangible Assets [Abstract]

Acquired intangible assets subject to amortization

   Acquired intangible assets subject to amortization as of March 31, 2013 and December 31, 2012 were as follows:

	March 31, 2013			December 31, 2012
(millions of dollars)		Gross Carrying Amount	Accumulated Amortization		Gross Carrying Amount	Accumulated Amortization
Patents and trademarks	$	6.0	3.5		6.0	3.4
Customer lists		2.9	2.4		2.9	2.4
	$	8.9	5.9		8.9	5.8

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Basis of Presentation

3 Months Ended

Mar. 31, 2013

Basis of Presentation [Abstract]

Basis of Presentation

Note 1.  Basis of Presentation

     The accompanying unaudited condensed consolidated financial statements have been prepared by management in accordance with the rules and regulations of the United States Securities and Exchange Commission.  Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted.  Therefore, these financial statements should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2012.  In the opinion of management, all adjustments, consisting solely of normal recurring adjustments necessary for a fair presentation of the financial information for the periods indicated, have been included.  The results for the three-month period ended March 31, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.

     Certain reclassifications were made to prior year amounts to conform to current year presentation.

     On November 14, 2012 the Company's Board of Directors authorized a two-for-one stock split of the of the Company's outstanding common stock, which was effected in the form of a 100-percent stock distribution payable on December 11, 2012 to shareholders of record on November 27, 2012.  Treasury shares were not treated as outstanding shares in the stock split.  The par-value of the Company's stock remained at $0.10 per share.  Unless otherwise noted, all share amounts and per share calculations in this quarterly report on Form 10-Q have been adjusted for all periods presented to reflect the impact of this split and to provide data on a comparable basis.

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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Comprehensive Income [Abstract]
Consolidated net income	$ 19,604	$ 18,608
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(14,785)	9,099
Pension and postretirement plan adjustments	1,766	1,821
Cash flow hedges [Abstract]
Net derivative gains (losses) arising during the period	586	(534)
Comprehensive income	7,171	28,994
Comprehensive income attributable to non-controlling interest	(379)	(943)
Comprehensive income (loss) attributable to MTI	$ 6,792	$ 28,051

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Legal Proceedings

3 Months Ended

Mar. 31, 2013

Legal Proceedings [Abstract]

Legal Proceedings

Note 11.  Legal Proceedings

     Certain of the Company's subsidiaries are among numerous defendants in a number of cases seeking damages for exposure to silica or to asbestos containing materials.  The Company currently has 72 pending silica cases and 10 pending asbestos cases. To date, 1,394 silica cases and 33 asbestos cases have been dismissed. Four new asbestos cases were filed in the first quarter of 2013, and one was dismissed.  Most of these claims do not provide adequate information to assess their merits, the likelihood that the Company will be found liable, or the magnitude of such liability, if any.  Additional claims of this nature may be made against the Company or its subsidiaries.  At this time management anticipates that the amount of the Company's liability, if any, and the cost of defending such claims, will not have a material effect on its financial position or results of operations.

     The Company has not settled any silica or asbestos lawsuits to date.  We are unable to state an amount or range of amounts claimed in any of the lawsuits because state court pleading practices do not require identifying the amount of the claimed damage.  The aggregate cost to the Company for the legal defense of these cases since inception was approximately $0.2 million, the majority of which has been reimbursed by Pfizer Inc pursuant to the terms of certain agreements entered into in connection with the Company's initial public offering in 1992. Of the 10 pending asbestos cases, all allege liability based on products sold largely or entirely prior to the initial public offering, and for which the Company is therefore entitled to indemnification pursuant to such agreements. Our experience has been that the Company is not liable to plaintiffs in any of these lawsuits and the Company does not expect to pay any settlements or jury verdicts in these lawsuits.

Environmental Matters

        On April 9, 2003, the Connecticut Department of Environmental Protection issued an administrative consent order relating to our Canaan, Connecticut, plant where both our Refractories segment and Specialty Minerals segment have operations. We agreed to the order, which includes provisions requiring investigation and remediation of contamination associated with historic use of polychlorinated biphenyls ("PCBs") and mercury at a portion of the site. We have completed the required investigations and submitted several reports characterizing the contamination. We are now conducting a site-specific risk assessment required by the regulators.

We believe that the most likely form of overall site remediation will be to leave the existing contamination in place (with some limited soil removal), encapsulate it, and monitor the effectiveness of the encapsulation. We anticipate that a substantial portion of the remediation cost will be borne by the United States based on its involvement at the site from 1942 – 1964, as historic documentation indicates that PCBs and mercury were first used at the facility at a time of U.S. government ownership for production of materials needed by the military. Though the cost of the likely remediation remains uncertain pending completion of the phased remediation decision process, we have estimated that the Company's share of the cost of the encapsulation and limited soil removal described above would approximate $0.4 million, which has been accrued as of March 31, 2013.

     The Company is evaluating options for upgrading the wastewater treatment facilities at its Adams, Massachusetts plant. This work has been undertaken pursuant to an administrative Consent Order originally issued by the Massachusetts Department of Environmental Protection ("DEP") on June 18, 2002. This order was amended on June 1, 2009 and on June 2, 2010.  The amended Order includes the investigation by January 1, 2022 of options for ensuring that the facility's wastewater treatment ponds will not result in unpermitted discharge to groundwater.  Additional requirements of the amendment include the submittal by July 1, 2022 of a plan for closure of a historic lime solids disposal area. Preliminary engineering reviews completed in 2005 indicate that the estimated cost of wastewater treatment upgrades to operate this facility beyond 2024 may be between $6 million and $8 million. The Company estimates that the remaining remediation costs would approximate $0.4 million, which has been accrued as of March 31, 2013.

     The Company and its subsidiaries are not party to any other material pending legal proceedings, other than routine litigation incidental to their businesses.

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Document and Entity Information (USD $)	3 Months Ended
	Mar. 31, 2013	Apr. 12, 2013	Jun. 29, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	Minerals Technologies Inc
Entity Central Index Key	0000891014
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 983,000,000
Entity Common Stock, Shares Outstanding		34,861,809
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013

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Non-Operating Income and Deductions, Net

3 Months Ended

Mar. 31, 2013

Non-Operating Deductions, Net [Abstract]

Non-Operating Deductions, Net

Note 12.  Non-Operating Income and Deductions, Net

		Three Months Ended
(millions of dollars)			March 31, 2013			April 1, 2012
	Interest income	$	0.7		$	1.0
	Interest expense		(0.8	)		(0.8	)
	Foreign exchange gains (losses)		0.6			(0.4	)
	Other deductions		(0.3	)		(0.4	)
Non-operating income (deductions), net		$	0.2		$	(0.6	)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 454,331	$ 454,092
Short-term investments, at cost which approximates market	15,586	14,178
Accounts receivable, net	197,834	193,328
Inventories	88,755	84,569
Prepaid expenses and other current assets	18,364	18,318
Total current assets	774,870	764,485
Property, plant and equipment, less accumulated depreciation and depletion - March 31, 2013 - $943,676; December 31,2012 - $944,283	312,436	317,669
Goodwill	65,081	65,829
Other assets and deferred charges	58,732	63,206
Total assets	1,211,119	1,211,189
Current liabilities:
Short-term debt	7,226	7,111
Current maturities of long-term debt	77,260	76,977
Accounts payable	109,857	98,371
Other current liabilities	55,785	67,639
Total current liabilities	250,128	250,098
Long-term debt	8,200	8,478
Accrued Pension and Post-Retirement Benefits	108,719	108,035
Other non-current liabilities	31,313	30,859
Total liabilities	398,360	397,470
Shareholders' equity:
Common stock	4,717	4,700
Additional paid-in capital	349,470	345,929
Retained earnings	1,049,870	1,032,869
Accumulated other comprehensive loss	(63,162)	(51,198)
Less common stock held in treasury	(551,337)	(541,889)
Total MTI shareholders' equity	789,558	790,411
Non-controlling interest	23,201	23,308
Total shareholders' equity	812,759	813,719
Total liabilities and shareholders' equity	$ 1,211,119	$ 1,211,189

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2013

Goodwill and Other Intangible Assets [Abstract]

Goodwill and Other Intangible Assets

Note 6.  Goodwill and Other Intangible Assets

     Goodwill and other intangible assets with indefinite lives are not amortized, but instead are tested for impairment, at least annually. The carrying amount of goodwill was $65.1 million and $65.8 million as of March 31, 2013 and December 31, 2012, respectively.  The net change in goodwill since December 31, 2012 was attributable to the effect of foreign exchange.

   Acquired intangible assets subject to amortization as of March 31, 2013 and December 31, 2012 were as follows:

	March 31, 2013			December 31, 2012
(millions of dollars)		Gross Carrying Amount	Accumulated Amortization		Gross Carrying Amount	Accumulated Amortization
Patents and trademarks	$	6.0	3.5		6.0	3.4
Customer lists		2.9	2.4		2.9	2.4
	$	8.9	5.9		8.9	5.8

     The weighted average amortization period for acquired intangible assets subject to amortization is approximately 15 years.  Estimated amortization expense is $0.6 million for 2013 and $0.4 million each of the next five years through 2018.

     Included in other assets and deferred charges is an intangible asset of approximately $0.5 million which represents the non-current unamortized amount paid to a customer in connection with contract extensions at seven PCC satellite facilities.  In addition, a current portion of $0.4 million is included in prepaid expenses and other current assets.  Such amounts will be amortized as a reduction of sales over the remaining lives of the customer contracts.  Approximately $0.1 million was amortized in the first quarter of 2013. Estimated amortization as a reduction of sales is as follows: remainder of 2013 - $0.3 million; 2014 - $0.4 million; 2015 - $0.1 million.

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Inventories

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Inventories

Note 5.   Inventories

     The following is a summary of inventories by major category:

(millions of dollars)		March 31,2013		December 31,2012
Raw materials	$	34.0	$	30.8
Work-in-process		6.8		6.5
Finished goods		26.8		26.5
Packaging and supplies		21.2		20.8
Total inventories	$	88.8	$	84.6

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Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventories [Abstract]

Inventories by Major Category

     The following is a summary of inventories by major category:

(millions of dollars)		March 31,2013		December 31,2012
Raw materials	$	34.0	$	30.8
Work-in-process		6.8		6.5
Finished goods		26.8		26.5
Packaging and supplies		21.2		20.8
Total inventories	$	88.8	$	84.6

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Noncontrolling interests

3 Months Ended

Mar. 31, 2013

Noncontrolling interests [Abstract]

Noncontrolling interests

Note 13 .  Non-controlling interests

     The following is a reconciliation of beginning and ending total equity, equity attributable to MTI, and equity attributable to non-controlling interests:

		Equity Attributable to MTI
(millions of dollars)		Common Stock		Additional Paid-in Capital		RetainedEarnings			AccumulatedOtherComprehensiveIncome (Loss)			Treasury Stock			Non-controlling Interests			Total
Balance as of December 31, 2012		$	4.7	$	345.9	$	1,032.9		$	(51.2	)	$	(541.9	)	$	23.3		$	813.7
Net income			--		--		18.8			--			--			0.9			19.7
Other comprehensive income			--		--		--			(12.0	)		--			(0.5	)		(12.5	)
Dividends declared			--		--		(1.8	)		--			--			--			(1.8	)
Dividends to non-controlling interest			--		--		--			--			--			(0.5	)		(0.5	)
Employee benefit transactions			--		2.7		--			--			--			--			2.7
Income tax benefit arising from employee
	stock option plans		--		0.7		--			--			--			--			0.7
Purchase of common stock for treasury			--		--		--			--			(9.4	)		--			(9.4	)
Stock based compensation			--		0.2		--			--			--			--			0.2
Balance as of March 31, 2013		$	4.7	$	349.5	$	1,049.9		$	(63.2	)	$	(551.3	)	$	23.2		$	812.8

The income attributable to non-controlling interests for the three-month periods ended March 31, 2013 and April 1, 2012 was from continuing operations. The remainder of the income was attributable to MTI. There were no changes in MTI's ownership interest for the period ended March 31, 2013 as compared with December 31, 2012.

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Comprehensive Income

3 Months Ended

Mar. 31, 2013

Comprehensive Income [Abstract]

Comprehensive Income

Note 9.  Comprehensive Income

The following are the reclassifications out of accumulated other comprehensive income, net of related tax:

(millions of dollars)		March 31, 2013
Amortization of prior service cost	$	(0.3	)
Amortization of actuarial gains(losses)		2.0
Total reclassifications from accumulated other comprehensive income	$	1.7

The above amounts are included in net periodic pension costs.  Please see note 8 to the condensed consolidated financial statements.

The major components of accumulated other comprehensive income, net of related tax, are as follows:

(millions of dollars)	Foreign Currency Translation Adjustments			Unrecognized Pension Costs			Net Gain on Cash Flow Hedges		Total
Balance as of December 31, 2012	$	32.0		$	(85.3	)	$	2.1	$	(51.2	)
Other comprehensive income/loss before reclassifications		(14.3	)		--			0.6		(13.7	)
Amounts reclassified from AOCI		--			1.7			--		1.7
Net current period other comprehensive income/loss		(14.3	)		1.7			0.6		(12.0	)
Balance as of March 31, 2013	$	17.7		$	(83.6	)	$	2.7	$	(63.2	)

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Long-Term Debt and Commitments

3 Months Ended

Mar. 31, 2013

Long-Term Debt and Commitments [Abstract]

Long-Term Debt and Commitments

Note 7.   Long-Term Debt and Commitments

     The following is a summary of long-term debt:

(millions of dollars)			March 31,2013		December 31,2012
5.53% Series 2006A Senior Notes
	Due October 5, 2013		$	50.0	$	50.0
Floating Rate Series 2006A Senior Notes
	Due October 5, 2013			25.0		25.0
Variable/Fixed Rate Industrial
	Development Revenue Bonds Series 1999 Due November 1, 2014			8.2		8.2
Installment obligations				1.4		1.4
Other borrowings				0.9		0.9
		Total		85.5		85.5
Less: Current maturities				77.3		77.0
Long-term debt			$	8.2	$	8.5

     As of March 31, 2013, the Company had $191.2 million of uncommitted short-term bank credit lines, of which approximately $7.2 million was in use.

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Benefit Plans

3 Months Ended

Mar. 31, 2013

Pension Plans [Abstract]

Pension Plans

Note 8.  Benefit Plans

The Company and its subsidiaries have pension plans covering the majority of eligible employees on a contributory or non-contributory basis. .  The Company also provides postretirement health care and life insurance benefits for the majority of its U.S. retired employees.   Disclosures for the U.S. plans have been combined with those outside of the U.S. as the international plans do not have significantly different assumptions, and together represent less than 25% of our total benefit obligation.

Components of Net Periodic Benefit Cost

				Pension Benefits						Other Benefits
				Three Months Ended						Three Months Ended
(millions of dollars)				March 31, 2013			April 1, 2012			March 31, 2013			April 1, 2012
Service cost			$	2.3		$	2.3		$	0.2		$	0.2
Interest cost				2.8			2.9			0.1			0.1
Expected return on plan assets				(3.7	)		(3.5	)		--			--
Amortization:
	Prior service cost			0.3			0.3			(0.8	)		(0.8	)
	Recognized net actuarial loss			3.4			3.4			--			--
		Net periodic benefit cost	$	5.1		$	5.4		$	(0.5	)	$	(0.5	)

     Amortization amounts of prior service costs and recognized net actuarial losses are recorded, net of tax, as increases to accumulated other comprehensive income.

Employer Contributions

     The Company expects to contribute approximately $10 million to its pension plans and $1.0 million to its other post retirement benefit plans in 2013.  As of March 31, 2013, $0.9 million has been contributed to the pension plans and approximately $0.2 million has been contributed to the other post retirement benefit plans.

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Accounting for Asset Retirement Obligations

3 Months Ended

Mar. 31, 2013

Accounting for Asset Retirement Obligations [Abstract]

Accounting for Asset Retirement Obligations

Note 10.  Accounting for Asset Retirement Obligations

The Company records asset retirement obligations for situations in which the Company will be required to incur costs to retire tangible long-lived assets. These are primarily related to its PCC satellite facilities and mining operations. The Company has also recorded the provisions related to conditional asset retirement obligations at its facilities.  The Company has recorded asset retirement obligations at all of its facilities except where there are no

legal or contractual obligations.  The associated asset retirement costs are capitalized as part of the carrying amount of the long-lived asset.

     The following is a reconciliation of asset retirement obligations as of March 31, 2013:

(millions of dollars)
Asset retirement liability, December 31, 2012	$	15.0
Accretion expense		0.2
Additions		0.1
Reversals		(0.3	)
Foreign currency translation and other		(0.1	)
Asset retirement liability,  March 31, 2013	$	14.9

     The current portion of the liability of approximately $0.4 million is included in other current liabilities and  the long-term portion of the liability of approximately $14.5 million is included in other non-current liabilities in the Condensed Consolidated Balance Sheet as of March 31, 2013.

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Inventories (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Inventories [Abstract]
Raw materials	$ 34,000,000	$ 30,800,000
Work-in-process	6,800,000	6,500,000
Finished goods	26,800,000	26,500,000
Packaging and supplies	21,200,000	20,800,000
Total inventories	$ 88,755,000	$ 84,569,000

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2013

Summary of Significant Accounting Policies [Abstract]

Use of Estimates

     Use of Estimates

     The Company employs accounting policies that are in accordance with U.S. generally accepted accounting principles and require management to make estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Significant estimates include those related to revenue recognition, allowance for doubtful accounts, valuation of inventories, valuation of long-lived assets, goodwill and other intangible assets, pension plan assumptions, income tax, income tax valuation allowances, and litigation and environmental liabilities. Actual results could differ from those estimates.

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Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Pension Plans [Abstract]

Components of Net Periodic Benefit Cost Table

Components of Net Periodic Benefit Cost

				Pension Benefits						Other Benefits
				Three Months Ended						Three Months Ended
(millions of dollars)				March 31, 2013			April 1, 2012			March 31, 2013			April 1, 2012
Service cost			$	2.3		$	2.3		$	0.2		$	0.2
Interest cost				2.8			2.9			0.1			0.1
Expected return on plan assets				(3.7	)		(3.5	)		--			--
Amortization:
	Prior service cost			0.3			0.3			(0.8	)		(0.8	)
	Recognized net actuarial loss			3.4			3.4			--			--
		Net periodic benefit cost	$	5.1		$	5.4		$	(0.5	)	$	(0.5	)

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Non-Operating Income and Deductions, Net (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Non-Operating Deductions, Net [Abstract]
Interest income	$ 700,000	$ 1,000,000
Interest expense	(800,000)	(800,000)
Foreign exchange gains (losses)	600,000	(400,000)
Other deductions	(300,000)	(400,000)
Non-operating deductions, net	$ 168,000	$ (598,000)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) Parenthetical (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CONDENSED CONSOLIDATED BALANCE SHEETS [Abstract]
Accumulated depreciation, depletion and amortization	$ 943,676	$ 944,283

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Income Taxes

3 Months Ended

Mar. 31, 2013

Income Taxes [Abstract]

Income Taxes

Note 4.   Income Taxes

     As of March 31, 2013, the Company had approximately $5.0 million of total unrecognized income tax benefits. Included in this amount were a total of $3.3 million of unrecognized income tax benefits that, if recognized, would affect the Company's effective tax rate. While it is expected that the amount of unrecognized tax benefits will change in the next 12 months, we do not expect the change to have a significant impact on the results of operations or the financial position of the Company.

     The Company's accounting policy is to recognize interest and penalties accrued relating to unrecognized income tax benefits as part of its provision for income taxes. The Company had a net increase of approximately $0.1 million during the first three months of 2013, and had an accrued balance of $1.1 million of interest and penalties as of March 31, 2013.

     The Company operates in multiple taxing jurisdictions, both within and outside the U.S.  In certain situations, a taxing authority may challenge positions that the Company has adopted in its income tax filings. The Company, with a few exceptions (none of which are material), is no longer subject to U.S. federal, state, local, and European  income tax examinations by tax authorities for years prior to 2006.

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Comprehensive Income (Tables)

3 Months Ended

Mar. 31, 2013

Comprehensive Income [Abstract]

Reclassifications out of accumulated other comprehensive income, net of related tax

The following are the reclassifications out of accumulated other comprehensive income, net of related tax:

(millions of dollars)		March 31, 2013
Amortization of prior service cost	$	(0.3	)
Amortization of actuarial gains(losses)		2.0
Total reclassifications from accumulated other comprehensive income	$	1.7

Accumulated other comprehensive income, net of related tax

The major components of accumulated other comprehensive income, net of related tax, are as follows:

(millions of dollars)	Foreign Currency Translation Adjustments			Unrecognized Pension Costs			Net Gain on Cash Flow Hedges		Total
Balance as of December 31, 2012	$	32.0		$	(85.3	)	$	2.1	$	(51.2	)
Other comprehensive income/loss before reclassifications		(14.3	)		--			0.6		(13.7	)
Amounts reclassified from AOCI		--			1.7			--		1.7
Net current period other comprehensive income/loss		(14.3	)		1.7			0.6		(12.0	)
Balance as of March 31, 2013	$	17.7		$	(83.6	)	$	2.7	$	(63.2	)

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Comprehensive Income (Details) (USD $)	3 Months Ended
	Mar. 31, 2013
Reclassifications out of accumulated other comprehensive income, net of related tax [Abstract]
Amortization of prior service cost	$ (300,000)
Amortization of actuarial gains(losses)	2,000,000
Total reclassifications from accumulated other comprehensive income	1,700,000
Accumulated Other Comprehensive Income (Loss), Currency Translation Adjustment [Roll Forward]
Balance at beginning of year	32,000,000
Other comprehensive income/loss before reclassifications	(14,300,000)
Amounts reclassified from AOCI	0
Net current period other comprehensive income/loss	(14,300,000)
Balance at end of year	17,700,000
Accumulated Other Comprehensive Income (Loss), Unrecognized Pension Costs [Roll Forward]
Balance at beginning of year	(85,300,000)
Other comprehensive income/loss before reclassifications	0
Amounts reclassified from AOCI	1,700,000
Net current period other comprehensive income/loss	1,700,000
Balance at end of year	(83,600,000)
Accumulated Other Comprehensive Income (Loss), Net Gain (Loss) On Cash Flow Hedges [Roll Forward]
Balance at beginning of year	2,100,000
Other comprehensive income/loss before reclassifications	600,000
Amounts reclassified from AOCI	0
Net current period other comprehensive income/loss	600,000
Balance at end of year	2,700,000
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance at beginning of year	(51,198,000)
Other comprehensive income/loss before reclassifications	(13,700,000)
Amounts reclassified from AOCI	1,700,000
Comprehensive income (loss) attributable to MTI	(12,000,000)
Balance at end of year	$ (63,162,000)

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Segment and Related Information

3 Months Ended

Mar. 31, 2013

Segment and Related Information [Abstract]

Segment and Related Information

Note 14.  Segment and Related Information

     Segment information for the three-month periods ended March 31, 2013 and April 1, 2012 was as follows:

Net Sales
(millions of dollars)	Three Months Ended
		March 31, 2013		April 1, 2012
Specialty Minerals	$	167.7	$	167.7
Refractories		83.6		89.4
Total	$	251.3	$	257.1

Income from Operations
(millions of dollars)	Three Months Ended
		March 31, 2013		April 1, 2012
Specialty Minerals	$	22.2	$	19.9
Refractories		6.9		9.1
Total	$	29.1	$	29.0

     The carrying amount of goodwill by reportable segment as of March 31, 2013 and December 31, 2012 was as follows:

Goodwill
(millions of dollars)
	Three Months Ended
		March 31, 2013	December 31, 2012
Specialty Minerals	$	13.6	14.1
Refractories		51.5	51.7
Total	$	65.1	65.8

     A reconciliation of the totals reported for the operating segments to the applicable line items in the condensed consolidated financial statements is as follows:

Income from operations before provision for taxes on income:		Three Months Ended
(millions of dollars)			March  31,2013			April 1,  2012
Income from operations for reportable segments		$	29.1		$	29.0
Unallocated corporate expenses			(2.0	)		(2.0	)
Consolidated income from operations			27.1			27.0
Non-operating income (deductions)			0.2			(0.6	)
Income from continuing operations
	before provision for taxes on income	$	27.3		$	26.4

     The Company's sales by product category are as follows:

		Three Months Ended
(millions of dollars)			March 31,2013		April 1, 2012
Paper PCC		$	121.3	$	121.7
Specialty PCC			16.8		16.4
Talc			12.4		12.1
Ground Calcium Carbonate			17.2		17.5
Refractory Products			62.4		69.1
Metallurgical Products			21.2		20.3
	Net sales	$	251.3	$	257.1