vat dye

vat dye
any of the class of insoluble dyes impregnated into textile fibers by reduction into soluble leuco bases that regenerate the insoluble dye on oxidation.
[1900-05]

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      any of a large class of water-insoluble dyes, such as indigo and the anthraquinone derivatives, that are used particularly on cellulosic fibres. The dye is applied in a soluble, reduced form to impregnate the fibre and then oxidized in the fibre back to its original insoluble form. Vat dyes are especially fast to light and washing. Brilliant colours can be obtained in most shades. Originated in medieval Europe, vat dyes were so named because of the vats used in the reduction of indigo plants through fermentation.

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Universalium. 2010.

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  • Vat dye — Vat dyes are an ancient class of dyes, based on the natural dye, indigo, which is now produced synthetically. OverviewThe process vat dyeing refers to dyeing in a bucket or fat. It can be performed whenever a liquid, even shade over the entire… …   Wikipedia

  • vat dye — n. a colorfast dye made soluble for application to cloth, then oxidized and thus rendered insoluble in the cloth vat dyed adj …   English World dictionary

  • vat dye — vat′ dye n. chem. any of a class of water insoluble dyes that are taken up by textile fibers and then fixed by oxidation • Etymology: 1900–05 …   From formal English to slang

  • vat dye — noun a water insoluble dye that is applied by reducing the dye to an alkaline form, applying the dye, then regenerating the insoluble dye by oxidation in the material; used for dyeing cotton • Syn: ↑vat color • Hypernyms: ↑dye, ↑dyestuff * * *… …   Useful english dictionary

  • vat dye — leukodažiklis statusas T sritis chemija apibrėžtis Bespalvė tirpi leukobazė, kuri oksiduojama ant dažomos medžiagos virsta spalvotu junginiu. atitikmenys: angl. leuco dye; vat dye rus. лейкокраситель …   Chemijos terminų aiškinamasis žodynas

  • vat dye — kubinis dažiklis statusas T sritis chemija apibrėžtis Vandenyje netirpstantis dažiklis, kurį prieš dažymą reikia redukuoti į tirpų leukojunginį. atitikmenys: angl. vat dye rus. кубовый краситель …   Chemijos terminų aiškinamasis žodynas

  • vat dye — noun Date: 1903 a water insoluble generally fast dye used in the form of a vat liquor called also vat color …   New Collegiate Dictionary

  • vat dye — /ˈvæt daɪ/ (say vat duy) noun any of a group of insoluble dyes which are applied to fabrics by first reducing them to alkali soluble leuco bases. After dyeing, the insoluble dye is regenerated in the fibres of the material by oxidisation …  

  • vat dye — noun Any of a type of dye, many based on indigo, in which a soluble form is used to impregnate a fibre or fabric and is then converted to an insoluble form …   Wiktionary

  • vat dye — noun an insoluble dye that is applied to a fabric in a reducing bath which converts it to a soluble form, the colour being obtained on subsequent oxidation …   English new terms dictionary

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