[ Ultrafine powder plastics in unprocessed form in the form of powder used for surface coating of extender pigments; ] unprocessed plastics [ ; nonmetallic minerals, namely, sulphur, foundry sand, kaolin, talc, rock salt, diatomaceous earth, barytes, saltpeter, bentonite, bauxite, magnesite, acid clay, natural graphite, dolomite, cryolite, fluorite, alunite, rock phosphate, sericite, silicon dioxide, apatite coated with an ultrafine powder plastic; nonmetallic minerals, namely, sulphur, found...