BGF Industries, Inc.: Technical Reference

Technical Reference
Glass Composition

	(By Weight)
	E-Glass	S-Glass
Silicone Dioxide	52 - 56%	64 - 66%
Calcium Oxide	16 - 25%	0 - .3%
Aluminum Oxide	12 - 16%	24- 26%
Boron Oxide	5 -10%
Sodium Oxide & Potassium Oxide	0 - 2%	0 - .3%
Magnesium Oxide	0 - 5%	9 - 11%
Iron Oxide	.05 - .4%	0 - .3%
Titanium Oxide	0 - .8%
Fluorides	0 -1.0%


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