COLORED GLAZE Russian patent published in 2007 - IPC C03C8/14 C04B41/86 

FIELD: building industry.

SUBSTANCE: invention relates to the glaze composition based on decreasing the content of ZnO, increasing content of Na₂O and MgO and using natural basalt as a pigment. The proposed glaze contains the following components, wt.-%: SiO₂, 41.0-54.0; Al₂O₃, 5.0-12.0; B₂O₃, 10.0-18.0; Fe₂O₃, 0.1-1.5; CaO, 3.0-12.0; MgO, 3.1-8.0; Na_sO, 1.5-4.6; K₂O, 3.0-8.0; ZnO, 3.0-7.6; ZrO₂, 3.0-7.9; TiO₂, 0.1-0.6, and pigment, 5.1-10.0. Invention provides preparing the colored cover showing high working properties and absence of crazes on cover. Invention can be used in manufacturing materials used in building industry, in particular, for covering articles of decorative, utility and domestic designation, ceramic plates.

EFFECT: improved and valuable technical properties of glaze.

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