Patent ID: 8007930
Filing Date: 2011-08-30
Classification: C03C

Abstract:
1. An opaque, fired enamel composition that is lead-free, cadmium-free, bismuth-free, tantalum-free and antimony-free, the enamel composition comprising, prior to firing an organic vehicle and a solids portion, wherein the solids portion comprises a frit portion, wherein the frit portion comprises, prior to firing: a. 10-80 wt % of a glass frit, the frit comprising b. a separate and distinct addition of 0.1-30 wt % pigment, and c. 0.1-15 wt % of a crystalline material selected from the group consisting of zinc borates, zinc silicates, zinc titanates, aluminum silicates, and combinations thereof, wherein, after firing, the enamel composition exhibits performance of chemical durability against wet through deterioration of at least 24 hours when tested in 0.1N H 2 SO 4 at 80° C.