cleaning, polishing, scouring and abrasive preparations for industrial or domestic use for removing stains, grease, paint, varnish and rust from wood, sheet metal and plastic surfaces

industrial ceramic materials, natural or synthetic silicates of calcium, magnesium or aluminum, aluminosilicates, clay minerals, calcined calcium, magnesium or aluminum silicate foam, in the nature of filtering materials for aqueous or oil-based suspensions, beverages, liquid foodstuffs, oils, syrups, pharmaceutical products and swimming pool water, industrial ceramic materials used as fillers in the manufacture of paint, paper, plastics or rubber