Inventories (Tables)

6 Months Ended

Jun. 30, 2012

Inventories

Schedule of inventories

	June 30,		December 31,
	2012		2011
Raw materials	$	654,831	$	609,150
Supplies	262,061		251,716
Work-in-progress	82,839		106,609
Finished goods	252,422		232,109
Total inventories	$	1,252,153	$	1,199,584