| http://www.w3.org/ns/prov#value | - The pigments prepared in accordance with the invention can be employed, in particular, for pigmenting high molecular weight organic materials of natural or synthetic origin, examples being cellulose ethers and cellulose esters, such as ethylcellulose, nitrocellulose, cellulose acetate or cellulose butyrate, natural resins or synthetic resins such as addition polymerization resins or condensation r
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