Lake refers to a pigment produced by the precipitation of a soluble dye in an inorganic base, which is insoluble in water.
Organic pigments can be roughly classified into two kinds, lake pigments and pigment pigments.
Lake pigments: Water-soluble pigments made of metal salts or other precipitants are insoluble in water.
In contrast to organic lakes, the pigment itself is water insoluble and is called a pigment pigment.
In the rules for the use of pigments, lakes are defined as "addition of a salt made of a pigment and a basic aluminum or calcium compounded water-soluble direct pigment onto a substrate of alumina."
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