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dye
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Examples of anthraquinone pigments. indigo Dyerswoad, Isatis tinctoria, is a source of indigo, considered the oldest known dye. Some early commercial synthetic dyes. Klebsiella pneumoniae in pneumonia Staphylococcus aureus The visible spectrum, which represents the portion of the electromagnetic spectrum that is visible to the human eye, absorbs wavelengths of 400–700 nm. Structures of common fibres. Some tanneries, such as that in Fès, Morocco, still rely on vat dyeing to tan leather. Fès, Morocco: tannery
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Examples of anthraquinone pigments.
Examples of anthraquinone pigments.

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Also known as: dyestuff
Written by
J.B. Stothers
Professor of Chemistry, University of Western Ontario, London. Author of Carbon-13 NMR Spectroscopy.
J.B. Stothers,
Edward Noah Abrahart
Former Assistant Research Manager, Clayton Aniline Co. Ltd., Manchester, England. Author of Dyes and Their Intermediates.
Edward Noah Abrahart•All
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.
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Key People:
Friedrich Bayer
Adolf von Baeyer

dye, substance used to impart colour to textiles, paper, leather, and other materials such that the colouring is not readily altered by washing, heat, light, or other factors to which the material is likely to be exposed. Dyes differ from pigments, which are finely ground solids dispersed in a liquid, such as paint or ink, or blended with other materials. Most dyes are organic compounds (i.e., they contain carbon), whereas pigments may be inorganic compounds (i.e., they do not contain carbon) or organic compounds. Pigments generally give brighter colours and may be dyes that are insoluble in the medium employed. ...(100 of 7982 words)

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