Chemical products; cellulose derivatives, carboxy-methyl-cellulose, cellulose-acetate; synthetic plastics, artificial and synthetic resins, in the form of plastic for use in industry, plastic raw materials, such as plastic compounds, moulding powders, synthetic plastic, raw material in the form of sheets, rods, tubes, films and foils for use in industry; films and plates all being sensitized and for use in photography and in cinematography, but specifically excluding water-soluble polymers