Schott Glas

Jutta Reichert

Friedrich Siebers

Ina Mitra

Otmar Becker

Michael Bug

Cora Krause

The invention relates to lead- and cadmium-free glass for glazing, enamelling and decorating glasses or glass-ceramics which have a low coefficient of thermal expansion of less than 2&times;10 /K, having the composition (in % by weight) 0-6 Li O, 0-5 Na O, 0 to less than 2 K O, where the sum Li O&plus;K &plus;Na O is between 2 and 12, 0-4 MgO, 0-4 CaO, 0-4 SrO, 0-1 BaO, 0-4 ZnO, 3 to less than 10 Al O , 13-23 B O , 50-65 SiO , 0-4 TiO , 0-4 ZrO and 0-4 F, as replacement for oxygen and containing up to 30% by weight of a pigment which is resistant at the firing temperature, where the glass is suitable for glazing, enamelling and decoration in both primary and secondary firing, and both the full-area and sparse glaze, enamel or decoration layers have low abrasion susceptibility after firing, and it relates to processes for the production of a glass-ceramic coated therewith.

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Gräfeling, Germany

Jutta Reichert