Lead-free glass composition and its use

摘要

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 %: - Na2O 10-15 - K2O 0.1-2 - SiO2 40-50 - B2O3 8-12 - TiO2 4-7 - Al2O3 0.1-3 - ZnO 13-17 - F 1-5 - and less than 0.5 weight % each of the oxides of the series PbO, CdO, P2O5, and alkaline earth metal oxides. Use of a dye preparation containing the glass frit at 600 DEG to 650 DEG C. results in bakeable glazed, crack-free, acid and base resistant enamel layers.