Process for producing decorated glass-ceramic articles

Details Process for producing decorated glass-ceramic articles Process for producing decorated glass-ceramic articles

C - Chemistry, Metallurgy

03

C

C03C 4/02 (2006.01) C03C 15/00 (2006.01) C03C 17/02 (2006.01) C03C 17/04 (2006.01) C03C 23/00 (2006.01)

Patent

CA 2068023

ABSTRACT A process for producing decorated glass-ceramic articles is described, an article of crystallisable glass being first decorated with a ceramic colour and then being converted into a glass-ceramic article by heat treatment with simultaneous burning-in of the ceramic colour, is improved by treating the glass article, before decorating, for 10 minutes to 50 hours with a Br?nsted acid at temperatures between 50 and 800°C. As a result of this treatment, the surface layer of the glass article is modified in such a way that the layer of ceramic- colour sinks into the surface of the article during burning-in/ceramicising. The use properties of the glass- ceramic are themselves not changed as a result.

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