1. A cooktop comprising:a glass or glass-ceramic substrate; and
a coating fixed to at least one portion of a surface of the glass or glass-ceramic substrate, wherein the coating comprises a heat treated dispersion layer, the heat treated dispersion layer comprising:
a continuous phase consisting essentially of at least one polysilsesquioxane resin, the at least one polysilsesquioxane resin having units of formula (RSiO1.5), R being identical or not, all different from an aryl group and being selected from a group consisting of linear and branched alkyl groups having 1 to 6 carbon atoms and cycloalkyl groups having 3 to 6 carbon atoms, wherein the at least one polysilsesquioxane resin is crosslinked; and
a dispersed phase consisting essentially of mineral fillers.