Patent ID: 7795163

Claim:
A decorated glass ceramic panel with a cooking surface, said cooking surface being provided with a black decoration by means of a burned-in decorative paint, wherein said decorative paint is applied to said cooking surface to form said black decoration, said glass ceramic panel has a black color and said decorative paint on the cooking surface contains a colorless zinc-containing glass flux and at least one partially coated pigment; wherein said at least one partially coated pigment consists of 20 to 40% by weight of a black pigment and 60 to 80% by weight of a zinc-free boro-alumino-silicate glass, said zinc-free boro-alumino-silicate glass coating said black pigment; wherein said black pigment has a grain size of at most 5μ, and a grain size distribution characterized by a D 50 <2μ and consists of a Cr—Fe—Co—Mn spinel; and wherein said colorless zinc-containing glass flux consists, in percent by weight, of: Li 2 O 0-5 Na 2 O 0-5 K 2 O <2 Σ Li 2 O + Na 2 O + K 2 O 1-10 MgO 0-3 CaO 0-4 SrO 0-4 BaO 0-4 ZnO 0-4 B 2 O 3 15-27 Al 2 O 3 10-20 SiO 2 43-58 TiO 2 0-3 ZrO 2 0-4 Sb 2 O 3 0-2 F 0-3; wherein said decorative paint consists of said at least one partially coated pigment and said colorless zinc-containing glass flux; and wherein said decorative paint contains said at least one partially coated pigment in an amount of from 9 to 10 percent by weight.