Colored glass compositions

摘要

A glass composition is disclosed. The glass composition includes base glass composition including SiO₂ from 65 to 75 weight percent, Na₂O from 10 to 20 weight percent, CaO from 5 to 15 weight percent, MgO from 0 to 5 weight percent, Al₂O₃ from 0 to 5 weight percent, K₂O from 0 to 5 weight percent, and BaO from 0 to 1 weight percent, and a colorant and property modifying portion including total iron from up to 0.02 weight percent, CeO₂ from 0.05 weight percent to 1.5 weight percent, CoO up to 50 PPM, Se up to 15 PPM, Cr₂O₃ up to 500 PPM, CuO up to 0.5 weight percent, V₂O₅ up to 0.3 weight percent, TiO₂ up to 1 weight percent, NiO up to 200 PPM, Er₂O₃ up to 3 weight percent, MnO₂ up to 0.6 weight percent, and Nd₂O₃ up to 2 weight percent, wherein the glass composition has a redox ratio up to 0.55.