Lead-free glass composition and its use

Abstract

The invention pertains to a new lead-free glass composition with improved properties, a glass frit of this composition and its use for the production of glass-enamel, particularly for architectural glass. The glass composition contains in mole %: ______________________________________ Na.sub.2 O 10-15 K.sub.2 O 0.1-2 SiO.sub.2 40-50 B.sub.2 O.sub.3 8-12 TiO.sub.2 4-7 Al.sub.2 O.sub.3 0.1-3 ZnO 13-17 F 1-5 ______________________________________ and less than 0.5 weight % each of the oxides of the series PbO, CdO, P.sub.2 O.sub.5, and alkaline earth metal oxides. Use of a dye preparation containing the glass frit at 600.degree. to 650.degree. C. results in bakeable glazed, crack-free, acid and base resistant enamel layers.

Dependencies are inferred from the claim text.