Explanatory notes
… for any purpose (e.g., for spinning, felting, etc., or for use as filtering, insulating, packing, etc., materials). … earths, slag, aluminium oxide, glass fibres, cork, etc., used as packing for heat-insulation purposes, or as … Note to heading 25.24. Asbestos paper, board and felt are usually obtained by crushing the fibres into pulp which is …