… expanded clays of heading 68.06), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or …
Explanatory notes
… expanded clays of heading 68.06), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or … or rocks of sedimentary origin with a basis of aluminium silicates. The characteristic properties of these products … are used as raw materials in the ceramic industry (bricks, building tiles, porcelain, china, earthenware, refractory …