… enamels and glazes, engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, …
Explanatory notes
… enamels and glazes, engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, … formed by the heat treatment of oxides (of antimony, silver, arsenic, copper, chromium, cobalt, etc.) or salts … (2) Vitrifiable enamels and glazes are mixtures of silica with other products (feldspar, kaolin, alkalies, …