Chemistry Lake pigment

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a typical lake pigment lithol rubine bk.


many lake pigments azo dyes. characteristically have sulfonate , carboxylate substituents, confer negative charge chromophore (colored species).


the metallic salt or binder used typically colourless or so. organic component of dye determines color of resulting precipitate. in ancient times chalk, white clay, , crushed bones used sources of calcium salts. today metallic salts typically chromium or cobalt, , resulting lake pigment diluted inert materials such alumina.








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