Orthorhombic lead chromate pigments of greenish hue

C - Chemistry – Metallurgy – 09 – C

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6/203

C09C 1/20 (2006.01)

Patent

CA 1272855

Orthorhombic lead chromate pigments of greenish hue Abstract of the Disclosure 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 characterised by a tinctorial strength of 0.067 to 0.013 at a standard depth of shade of 1/25 in accordance with DIN 53 235 and by an opacity factor YblaCk/YWhit 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.

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