| 摘要 |
A glass composition that includes a base glass composition including: SiO<SUB>2</SUB> from 65 to 75 weight percent, Na<SUB>2</SUB>O from 10 to 20 weight percent, CaO from 5 to 15 weight percent, MgO from 0 to 5 weight percent, Al<SUB>2</SUB>O<SUB>3</SUB> from 0 to 5 weight percent, K<SUB>2</SUB>O from 0 to 5 weight percent and BaO 0 to 1 weight percent, and a colorant and property modifying portion including total iron from 0.25 to 0.9 weight percent, Cr<SUB>2</SUB>O<SUB>3</SUB> from 6 PPM to 400 PPM, Er<SUB>2</SUB>O<SUB>3</SUB> from 0.3 to 3.0 weight percent, and TiO<SUB>2</SUB> from 0.1 to 0.8 weight percent, wherein the glass composition has a redox ratio ranging from 0.15 to 0.62. |
