| http://www.w3.org/ns/prov#value | - Coloring agents which can be used include pigments such as titanium oxide, carbon black, iron oxide, phthalocyanine-based pigments, and azo-based pigments, and dyes such as Methylene Blue, Crystal Violet, Rhodamine B, Oil Blue, Fuchsin, Auramine, azo-based dyes, and anthraquinone-based dyes.
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