To improve certain pigments based on zinc sulphide by substitution of selenium with sulphur and pigments based on zinc sulphide containing selenium

摘要

P the pigments are constituted by a matrix of zinc sulphide comprising, in solid solution, a quantity sufficient to modify the color of the pigment of copper sulphide and indium, in which at least a portion of the sulphur was replaced by of the selenium. They comprise optionally other constituents, in particular, the barium sulphate as a diluent. / p