GLAZE Russian patent published in 1994 - IPC

FIELD: building. SUBSTANCE: glaze has the following components, wt.- %: silicon oxide 35-36; aluminium oxide 9-10; magnesium oxide 2-3; sodium oxide 15-16; calcium oxide 0.6-0.8; ferric oxide (III) 0.6-0.8; potassium oxide 0.5-0.7; tin oxide 3.2-3.4; barium oxide 4.0-4.4; lead oxide 12-13; zinc oxide 14-15, and cadmium oxide 0.3-0.5. Glaze properties: roasting point is 950 C, resistance to cold is 290 cycles. EFFECT: enhanced quality of enamel. 1 tbl