Patent ID: 7981823
Filing Date: 2011-07-19
Classification: C03C

Abstract:
1. A method for preparing a transparent, colorless lithium-aluminosilicate glass ceramic plate with high-quartz mixed crystals as the prevailing crystal phase, which is provided on one side with an opaque, colored, temperature-stable coating over the entire surface or over the entire surface to a large extent, having a Yellowness Index of less than 10% with a 4 mm thickness, and a variegation of colors of the glass ceramic in the CIELAB color system of C* of less than 5, comprising preparing a composition which preparation includes the addition of 0.01 to 0.4% by weight of Nd and one or more chemical refining agents or refining additives in a total content of up to 2.0% by weight, wherein SnO wherein the content of ZrO