Patent No. U.S. 7,026,039 B2
Saint-Gobain Ceramics and Plastics, Inc. has received a patent for a ceramic member comprised of a ceramic substrate; and a decal provided on a portion of the substrate as a marker for labeling the substrate. The decal has a different color then that of the substrate and good edge definition after a heat cycle during which the ceramic member is exposed to a temperature of at least 1100° C wherein the decal consists essentially of a refractory ceramic composition including unstabilized zirconia and silica.