Glass enamel fluxes

Details Glass enamel fluxes Glass enamel fluxes

C - Chemistry, Metallurgy

03

C

261/14

C03C 17/02 (2006.01) C03C 8/12 (2006.01)

Patent

CA 1120959

Abstract of the Disclosure The invention disclosed is a family of enamel fluxes that forms the basis for enamels used in decorating opal glasses where the glasses have softening points in excess of 760°C. and coefficients of thermal expansion (25-300°C.) of 70-85 x 10-7/°C. The enamel fluxes have softening points in the range of 550-575°C., toxic metal release values below FDA prescribed standards, coefficients of thermal expansion in the range of 65-75 x 10-7/°C. and preferably at least 5 units below the coefficient of the opal glass, and fire to a high gloss in a firing cycle of less than 10 minutes having a maximum temperature below 720°C. They have compositions that form a family in the Li2O-Na2O-B2O3-TiO2-CdO-ZrO2-PbO- SiO2 system.

330421

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