FIELD: glass industry. SUBSTANCE: color-contrasting glass has, wt.-%: silicon oxide (SiO2) 54.2-62.8; boron oxide (B2O3) 17.7-21.5; potassium or sodium oxide (K2O,Na2O) 17.7-21.5; neodymium oxide (Nd2O3) 0.61-1.81; praseodymium oxide (Pr2O3) 0.80-1.27; cobalt oxide (CoO) 0.006-0.018, and manganese oxide (Mn2O3) 0.044-0.081. Image degree of contrast τ445/τ490 is 0.73-0.97. Glass is used for color filter making. EFFECT: enhanced quality of glass. 2 tbl
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Authors
Dates
1994-07-30—Published
1991-06-21—Filed