Explanatory notes
… (bricks, building tiles, porcelain, china, earthenware, refractory bricks and other refractory goods, etc.); common … moulding sand, as a filtering and decolouring agent in oil refining and for degreasing of textiles. (2) Fuller’s … earthy material with high absorptive power, composed chiefly of attapulgite. It is used for decolourising oils, …