GLASS Russian patent published in 2007 - IPC C03C3/89 

FIELD: glass industry.

SUBSTANCE: invention proposes glass of the following composition, wt.-%: SiO₂, 55.0-60.0; K₂O, 3.0-5.0; Na₂O, 3.0-5.0; B₂O₃, 3.0-5.0; ZnO, 3.0-5.0; CdS, 0.4-1.0; Se, 0.3-1.0; CaO, 4.0-6.0; BaO, 4.0-7.0; TiO₂, 12.5-17.5, and Sb₂O₃, 0.1-0.2. The refraction coefficient of glass is (1.7-1.8) ± 0.05. Invention provides enhancing the refraction coefficient of glass. Invention is designated for manufacturing illumination equipments and articles of decorative-artistic designation.

EFFECT: improved and valuable property of glass.

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