Explanatory notes
… mineral (barium sulphate, calcium sulphate, aluminium oxide, China clay, talc, silica, siliceous fossil earth, … on the base with precipitating agents (tannin, barium chloride, etc.), or by co-precipitation of the colouring … a high resistance to oxidation, such as azo dyes, vat dyes derived from anthraquinone, or alizarin dyes. These lakes …