A pigment based on coprecipitated chromium(III) and copper(II) hydroxides

The results of experiments on coprecipitation of copper and chromium hydroxides are presented. It is established that the final product of coprecipitation is an individual hydroxide compound that transforms when heated into Cu₂Cr₂O₄ and CuCr₂O₄ spinels which preserve their stability up to 1200°C. The pigment can be used for decorating porcelain and ceramic tile.Translated from Steklo i Keramika, No. 7, pp. 21 – 23 , July, 1996.