17 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, sheets and panels; plastic insulating structural panel for thermal, acoustic or optical protection against solar radiation; structural insulation panels made of plastic materials designed to reduce the greenhouse effect; insulating materials in the form of plates reflecting short infrared rays, giving a solar and thermal protection effect; semi-processed plastic materials in the form of sheets; semi-processed plastic materials in the form of panels; semi-processed corrugated plastic materials in the form of sheets; extruded corrugated plastic materials in the form of sheets for use in further manufacturing; semi-processed plastic cellular materials; semi-processed plastics, namely, solid polypropylene sheets, double-walled and bubble-structure sheets; semi-processed plastics, namely, solid polypropylene, double-walled and bubble-structure sheets for manufacturing bottles or containers of plastic; plastic films, other than for packaging, namely, plastic film for use in commercial or industrial manufacturing; plastic film for commercial or industrial packing use and plastic film for packing, cushioning, or stuffing purposes, all of the above-products not being used for packaging; weatherstripping compositions for use in automobiles and homes; caulking materials; semi-processed plastics, namely, plastic wall panels, panels for ceilings, floors and hulls, all for use in the manufacture of road, rail, marine and air vehicles; semi-processed plastics, namely, cellular plastic panels, used as wall panels, panels for ceilings, floors and hulls, all for use in the manufacture of road, rail, marine and air vehicles; semi-processed plastic panels, used in the manufacture of plastic automotive parts, semi-processed plastic boards, semi-processed fluted plastic, semi-processed extruded fluted plastic and plastic cellular material