Explanatory notes
… mineral (barium sulphate, calcium sulphate, aluminium oxide, China clay, talc, silica, siliceous fossil earth, … solution of the colouring matter. (3) Intimate mechanical mixing of an insoluble colouring matter with the inert base. … colouring matter (heading 32.04) with a high resistance to oxidation, such as azo dyes, vat dyes derived from …