FIELD: sort glassware production. SUBSTANCE: crystal glass has, wt.-%: silicon oxide 52.0-54; boron oxide 5-6; calcium oxide 11-19; zinc oxide 6.5-11; sodium oxide 9.2-10.2; aluminium oxide 0.8-1.2; titanium oxide 4.3-5.5, and tungsten oxide 1.5-2. Refraction coefficient is 1.563- 1.567, water resistance is 0.03-0.035%. EFFECT: enhanced quality of crystal glass. 1 tbl
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