GLAZE Russian patent published in 1994 - IPC

FIELD: silicate technology. SUBSTANCE: glaze has, wt.-%: silicon oxide (БФ SiO₂) 44.5-45.02; aluminium oxide (4,5-5,0 БФ Al₂O₃) 4.5-5.0; calcium oxide (CaO) 12.7-14.0; sodium oxide (4,9-5,5 БФ Na₂O) 4.9-5.5; magnesium oxide (MgO) 5.2-7.0; boron oxide (17,2-18,0 БФ B₂O₃) 17.2-18.0; manganese oxide (5,0-5,5 БФ MnO₂) 5.0-5.5, and chrome oxide (2,0-3,0 БФ Cr₂O₃) 2-3. Glaze properties thermal stability is 310± 10^°C, luster is 20-30%, wear-resistance is 0,01-0,015 g/cm². EFFECT: enhanced quality of glaze. 1 tbl