… engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, enamelling or glass …
Explanatory notes
… engobes (slips), liquid lustres and similar preparations, of a kind used in the ceramic, enamelling or glass … are dry mixtures formed by the heat treatment of oxides (of antimony, silver, arsenic, copper, chromium, cobalt, etc.) … with other products (feldspar, kaolin, alkalies, sodium carbonate, alkaline-earth metal compounds, lead oxide, boric …