17 Unprocessed and semi-processed materials, not being designed for a specific use, included in this class, namely, polyester, mineral fibres, elastomers, cellulose, fibres impregnated with artificial resins, synthetic and composite materials, namely, carbon fibre, cellulose acetate, ceramic fibres, not for textile use; resins in extruded form; semi-worked plastic substances; finished or semi-finished goods, adapted for a specific use, included in this class, namely, plastic filaments for 3d printers; 3d printing materials for use in computerised 3d printers, namely, plastic and ceramic materials