C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
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.
487282
Algra Gerben Pieter
Erkens Leonardus Johannes Hubertus
Geurts Herman Joseph Johannes Maria
Pugin Andre
Snijders Jacobus Michiel Hubertus
Ciba-Geigy Investments Ltd.
Fetherstonhaugh & Co.
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