Patent ID: 7560404

Claim:
A glass composition comprising a base glass composition, comprising: SiO 2 65 to 75 weight percent, Na 2 O 10 to 20 weight percent, CaO 5 to 15 weight percent, MgO 0 to 5 weight percent, Al 2 O 3 0 to 5 weight percent, K 2 O 0 to 5 weight percent, B 2 O 3 0 to 5 weight percent, and MnO 2 0 to 0.5 weight percent and a colorant and property modifying material portion consisting essentially of: total iron up to 0.65 weight percent, Se ranging from 2 PPM to 10 PPM, at least one UV absorber selected from CeO 2, V 2 O 5 , TiO 2 and MoO 3 , CoO up to 20 PPM, and Cr 2 O 3 up to 75 PPM, wherein the glass composition has a redox ratio ranging from 0.45-0.55.