| 摘要 |
Soda-lime glass contains by weight the following glass forming oxides: -SiO2 60 to 75% -Na2O 10 to 20% -CaO 0 to 16% -K2O 0 to 10% -MgO 0 to 10% -Al2O3 0 to 5% -BaO 0 to 2% -BaO + CaO + MgO 10 to 20% -K2O + Na2O 10 to 20% - In order to produce a tinted glass having favorable properties as regards its cost, color and freedom from haze, the following coloring agents (proportions by weight) are incorporated in the glass: -Fe2O3 0.3 to 0.5% -Cr2O3 0.0075 to 0.0230% -Se 0.0005 to 0.0019% -Co 0.0040 to 0.0070% -Ni 0.0050 to 0.0120% -
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