GLAZE Russian patent published in 2008 - IPC C03C8/10 

FIELD: technology of silicates.

SUBSTANCE: invention relates to compositions of fritted glazes that can be used in production of facing tile. Proposed glaze comprises SiO₂, Al₂O₃, CaO, MgO, K₂O, B₂O₃ and, additionally, PbO and NiO in the following ratio of components, wt.-%: SiO₂, 48.0-52.0; Al₂O₃, 7.0-9.0; CaO, 6.0-20.0; MgO, 2.0-6.0; K₂O, 3.0-4.0; B₂O₃, 6.0-8.0; PbO, 5.0-8.0, and NiO, 2.0-4.0. Invention provides enhancing resistance of glaze to cold.

EFFECT: improved and valuable property of glaze.

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