from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of a specific class of anthraquinone vat dyes

from The Century Dictionary and Cyclopedia

  • n. A coal-tar color related to anthracene made by fusing beta-amino-anthraquinone with caustic potash. It dyes cotton and other vegetable fibers in a hyposulphite reduction-vat and gives very fast blues. When combined with flavanthrene it gives one of the fastest greens known.


From indigo + anthraquinone (Wiktionary)


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