| http://www.w3.org/ns/prov#value | - Alternatively, the grinding may be conducted in the presence of 0.1 to 30%, and preferably 0.5 to 15% by weight, of a grinding aid such as an alkylated vinylpyrrolidone polymer, a vinylpyrrolidone-vinylacetate copolymer, an acylglutamate, an acrylate-tert.-octylpropenamide copolymer, a ditolylether sulphonic acid-formaldehyde condensate, a carbomer, a commercial mixture of fatty acid esters compri
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