Semi-worked plates, sheets and panels of solid plastic as semi-finished products, for use in graphic printing media; synthetic plastic foam being semi-finished or semi-worked products in the form of plates, sheets, and panels, all for use in manufacturing graphic printing media; semi-finished products, namely, sheets, plates and rods of plastic materials, particularly based on polypropylene or polycarbonate other than for packing; semi-finished cellular plastic material in the form of plates,...