In dyeing and painting, an often fugitive crimson or vermillion pigment derived from an organic colorant (cochineal or madder, for example) and an inorganic, generally metallic mordant.
In the composition of colors for use in products intended for human consumption, made by extending on a substratum of alumina, a salt prepared from one of the certified water-soluble straight colors.
For example, the name of a lake prepared by extending the aluminum salt prepared from FD&C Blue No. 1 upon the substratum would be FD&C Blue No. 1--Aluminum Lake.