DULL CERAMIC OVERGLAZED DYE Russian patent published in 1997 - IPC

FIELD: ceramics. SUBSTANCE: dull ceramic overglazed dye has the following components, wt.-%: lead oxide $$$, 6.40-8.00; silicon oxide $$$, 37.2-38.8; zinc oxide ZnO, 2.2-3.6; aluminium oxide $$$, 6.6-9.0; titanium oxide $$$, 1.0-2.2; magnesium oxide MgO, 4.5-6.5; ferric oxide $$$, 21-23; boron oxide $$$, 1.6-3.0; sodium oxide $$$, 0.8-1.2; calcium oxide CaO, 0.3-0.5; tin oxide $$$, 6.9-9.3; and sodium fluoride NaF, 2.5-3.9. Dye properties: color - light-green, absence of mirror component, dominating wave-length $$$ = 584 nm, stable coloristic properties and high saturation. Dye is used for ceramic articles making. EFFECT: improved quality and property of dye. 3 tbl