GREENISH ORTHORHOMBIC LEAD CHROMATE PIGMENTS

摘要

The invention relates to orthorhombic lead chromate pigments of greenish hue, which contain lead chromate and lead sulfate in the weight ratio of 60:40 to 100:0, and which are characterized by a tinctorial strength of 0.067 to 0.103 at a standard depth of shade of 1/25 in accordance with DIN 53 235 and by an opacity factor Yblack/Ywhite of 0.78 to 0.87. These pigments are obtainable by mixing an aqueous solution of a chromate and, if necessary, of a sulfate, under high turbulence.