… Ceramic building bricks, flooring blocks, support or filler tiles and the like. …
Explanatory notes
… biscuit porcelain (including parian) and bone china. All these ceramics are almost completely vitrified, hard, … firing temperature than with hard porcelain. The glaze is normally applied by further firing at a lower temperature, … is unglazed porcelain, of which parian-ware (sometimes called Carrara porcelain) is a special, fine-grained, …