… Prepared pigments, prepared opacifiers and prepared colours, vitrifiable enamels and glazes, engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, enamelling or glass industry; glass frit and other glass, in the form of powder, …
Explanatory notes
… and prepared colours are dry mixtures formed by the heat treatment of oxides (of antimony, silver, arsenic, copper, … the form of powdered frit (see below). They may be transparent (whether or not coloured) or rendered opaque by … are used as abrasives, for decorating postcards, Christmas tree decorations, for obtaining coloured glass articles, …