Substrate provided with a glass flow-based coating, glass flux material and method for coating a glass or glass ceramic substrate

摘要

The invention relates to a glass flux material for applying an opaque coating which comprises at least one pigment and a glass component having the following composition: SiO 2 55-70 mol%, Al 2 O 3 2.5-8 mol%, Bi 2 O 3 0.5-4 mol%, B 2 O 3 14-27 mol%, with at least 2.5 mol% of at least one oxide of the group Li2O, Na2O and K2O, wherein the ratio of alkali oxides to alumina Σ R2O / Al2O3 is less than 6.