dye: Quick Facts

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Examples of anthraquinone pigments.

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

The science behind dyeing Easter eggs

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Topics

Safranine T disperse dye carthamin optical brightener eosin fugitive tint methylene green acetate dye substantivity aniline dye construction printing textile aerospace industry pharmaceutical industry chemical industry automotive industry electronics explosive food preservation

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Key People

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Friedrich Bayer

German businessman [1825–1880]

Baeyer, 1905

Adolf von Baeyer

German chemist

Color wheel, visible light, color spectrum. Colour wheel

The Origins of Colors, Pigments, and Dyes