… and glazes, engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, enamelling or …
Explanatory notes
… in the glass industry or for colouring or finishing metal articles. (1) Prepared pigments, prepared opacifiers and … are dry mixtures formed by the heat treatment of oxides (of antimony, silver, arsenic, copper, chromium, cobalt, etc.) … of opacifiers or pigments; sometimes substances (e.g., titanium or zinc oxides) are added which produce decorative …