40 Metal treatment services, namely, galvanizing, metal plating, metal casting, custom manufacture of boilers, metal tempering, providing material treatment information, nickel plating, cadmium plating, chromium plating, tin plating, lead working; precious metal treatment services, namely, gold plating, silver plating, silversmithing; processing of cinematographic films, photographic processing, photographic film developing, photographic printing, photogravure, photocomposing services; processing of raw materials for use in the manufacture of food; millworking, flour milling, food canning; slaughtering of animals; fur and leather treatment, namely, fur dyeing, leather staining, tanning of leather, mothproofing, fur conditioning, leather conditioning, fur glossing, leather glossing; saddlery working; treatment of fabric, namely, yarn warping using looms for weaving, mothproofing of fabric, edging of fabric, cutting of fabric, bleaching of fabric, dyeing of fabric, permanent press treatment of fabric, fireproofing of fabric, waterproofing of fabric, pre-shrinking of fabric, crease resistant treatment of fabric, wool treatment and finishing; tailoring or dressmaking, sewing services, cutting of cloth, clothing alteration, embroidery services; woodworking, timber felling and processing, timber logging, engraving; framing of works of art; environmental remediation services, namely, waste and water treatment services, air deodorizing, recycling of waste materials, sorting of waste and recyclable material, fuel treatment services, fuel refining, water treatment and purification; treatment of glass materials, optical glass grinding, glass blowing, glass tinting, glass plating, namely, soldering together two or more layers of glass, grinding and polishing glass for eyeglasses; custom assembling of products for others; dental technician services; pottery firing; production of energy, rental of electric power generators; paper treatment, paper finishing; printing of books, offset printing, lithographic printing, silk screen printing, printing of patterns on textiles, bookbinding; material treatment of plastics, namely, laminating of plastic sheets, injection molding of plastics for others