Abstract: Hitherto, glazing defects have arisen during glazing of ceramic substrates with an electrostatically applicable coating powder. This problem is solved by the coating powder CPAB and the coating method. The electrostatically applicable coating powder CPAB contains 1 to 50 wt. % of a glass-forming composition A which begins softening at 400 to 750° C. and 99 to 50 wt. % of a glass-forming composition B which begins to soften above 750-1,100° C. Preferably, the coating powder consists of 2.5 to 25 wt. % A, 75 to 97.5 wt. % B and 0 to 20 wt. %, specially 2 to 10 wt. % of thermally or chemically activatable adhesive agents. The coating powder CPAB is electrostatically applied as a single powder. Alternately, coating can be applied in two layers, wherein the CPU powder contains at least 5 wt. % of glass-forming composition A as a lower layer and the powder CPO contains at least 50 wt. % of glass-forming composition B as an upper layer.

Abstract: A method of decorating a firable article which includes the step of mixing a metallic salt with a fuel material which can supply oxygen to the salt in a reaction. This mixture causes complex formation of the salt, characterized by raising the pH of the mixture to at least 5. Additives in the mixture promote stability and provide the required viscosity surface tension and conductivity for use in an ink jet printer. When applying a solution of this mixture onto a firable article by ink jet printing, the mixture is such that upon drying, the mixture reacts to form an oxide of the metal to provide a decorative color pigment on the article.