… preparations, of a kind used in the ceramic, enamelling or glass industry; glass frit and other glass, in the form of powder, granules …
Explanatory notes
… preparations, of a kind used in the ceramic, enamelling or glass industry; glass frit and other glass, in the form of … boric acid, etc.) giving a smooth surface, either matt or glossy, by vitrification under heat. In most cases some of …