Explanatory notes
… for spinning, felting, etc., or for use as filtering, insulating, packing, etc., materials). Crude asbestos fibres … includes mixtures of asbestos with magnesium carbonate, cellulose fibres, sawdust, pumice stone, talc, plaster, … oxide, glass fibres, cork, etc., used as packing for heat-insulation purposes, or as filtering material, or as a basis …