| http://www.w3.org/ns/prov#value | - It may typically comprise natural resins or drying oils, rubber or casein or modified natural substances such as chlorinated rubber, oil-modified alkyd resins, viscose, cellulose ethers and esters, including cellulose acetate, cellulose propionate, cellulose acetobutyrate or nitrocellulose, but preferably comprises man-made organic polymers (thermosetting resins and thermoplastic resins) obtained
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