CHEMICAL PRODUCTS FOR GALVANIC PURPOSES-NAMELY, SALTS FOR METAL COLORING; DEGREASING SALTS FOR GALVANIC BATHS; CHEMICAL MEANS FOR PRODUCTION OF METALLIC COATINGS ON PLASTIC PARTS, PLASTIC PLATES, PLASTIC CONTAINERS AND PLASTIC TUBES BY WAY OF ELECTROLYTIC OR CHEMICAL SURFACE TREATMENT, DEPOSITION, SPRAYING, PAINTING OR IMMERSION