Manufacture of other non-metallic mineral products n.e.c.

**Official Rulings:** - Calcination of kaolin - Drying and grinding of clay into clay powder, fit for the production of ceramics

This class includes: - manufacture of friction material and unmounted articles thereof with a base of mineral substances or of cellulose - manufacture of mineral insulating materials: . slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays and similar heat-insulating, sound-insulating or sound-absorbing materials - manufacture of articles of diverse mineral substances: . worked mica and articles of mica, of peat, of graphite (other than electrical articles) etc. - manufacture of articles of asphalt or similar material, e.g. asphalt-based adhesives, coal tar pitch etc. - manufacture of carbon and graphite fibres and products (except electrodes and electrical applications) - manufacture of artificial corundum

This class excludes: - manufacture of glass wool and non-woven glass wool products, see 23.14 - manufacture of graphite electrodes, see 27.90 - manufacture of carbon or graphite gaskets, see 28.29