PRODUCTION OF ROUGH GLASS STONE FOR ARTISTIC HANDICRAFT
PURPOSE:To improve luster by adding ZnO as a colorant to starting material contg. SiO2, Na2CO3 and CaF2 in a specified weight ratio and having a prescribed total FeO and MnO content or below, melting and solidifying them. CONSTITUTION:Starting materials blended so as to obtain a compsn. contg. 35-60...
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