	US 7,601,660 B2
	Clear glass composition
Don Tullman, Troy, Mich. (US); Scott V. Thomsen, Milford, Mich. (US); Richard Hulme, Rochester Hills, Mich. (US); Leonid Landa, Grosse Ile, Mich. (US); and Ksenia A. Landa, Grosse Ile, Mich. (US)
Assigned to Guardian Industries Corp., Auburn Hills, Mich. (US)
Filed on Mar. 15, 2004, as Appl. No. 10/800,015.
Claims priority of provisional application 60/548180, filed on Mar. 01, 2004.
Prior Publication US 2005/0188725 A1, Sep. 01, 2005
Int. Cl. C03C 3/087 (2006.01); C03B 13/00 (2006.01)

U.S. Cl. 501—70 [65/99.2; 501/71]

26 Claims

1. A method of making a glass comprising:


	Ingredient	wt. %

	SiO₂	67-75%
	Na₂O	10-20%
	CaO	5-15%
	total iron (expressed as Fe₂O₃)	0.01 to 0.30%

wherein the glass has visible transmission of at least 90%, a transmissive a* color value of −1.5 to +1.0, and a transmissive b* color value of −1.0 to +1.5, wherein the method comprises:

utilizing a batch redox of from +7.5 to +14 when making said glass.