... pigment Lithopone1, Physicochemical Properties: White powder, mixture of zinc sulfide and barium sulfate, relative density 4.136-4.39, insoluble ... stronger in whiteness and covering power. The more zinc sulfide it contains, the stronger covering power and the higher ... 1995)Items B301excellentThe 1StqualifiedSum of total zinc calculated in zinc sulfide and barium sulphate %(m/m)≥ 99Total zinc content ( ...