GLASS COMPOSITION INTENDED FOR GLAZING, AND GLAZING Russian patent published in 2000 - IPC

FIELD: manufacture of glazing. SUBSTANCE: glass comprises ingredients, ratios of components being as follows wt.%: SiO₂, 69-75%; Al₂O₃, 0-3; B₂O₃, 0-5; CaO, 2-10; MgO, 0-2; Na₂O, 9-17; K₂O, 0-8; Fe₂O₃, (all iron), 0.2-4; Se, CoO, Cr₂O₃,, NiO, CuO, 0-045; content of colorants other than iron is at least 0.0002% when content of Fe₂O is equal or lower than 1.5%. The composition contains also fluorine, oxides of zinc, zirconium, cerium, titanium and less than 4% of barium oxide; total content of alkaline- earth metal oxides is equal or less than 10 wt.%. EFFECT: higher light transmission of glass. 16 cl, 2 tbl