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Vat dyes are a class of dyes that are classified as such because of the method by which they are applied. Vat dyeing is a process that refers to dyeing that takes place in a bucket or vat. The original vat dye is indigo , once obtained only from plants but now often produced synthetically.
The Clayton Aniline Company Ltd. was a British manufacturer of dyestuffs, ... (buildings 188, 189 and 190). The completion of the vat dyes project was held up by the ...
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Furthermore, the quality of the new dyes increased. Chemist Rene Bohn developed a brilliant blue vat dye, indanthrone, with excellent color fastness in 1901. BASF(Badische Anilin und Soda Fabrik), the largest manufacturer of vat dyes, sold it as Indanthren Blue RS, along with the synthetic indigo they placed on the market in 1897. [19]
The process of printing with Inkodye resembles that of other alternative photographic processes though its chemistry is related to vat dyes such as indigo rather than iron or silver-based chemicals used in cyanotype or Van dyke brown which have higher toxicity. Inkodye is available in several colors (red, orange, copper, blue, navy, magenta ...
Pigment Violet 29 (C.I. 71129) is an organic compound that is used as a pigment [1] and vat dye. Its colour is dark red purple, or bordeaux. [1] [2] Structurally, it is a derivative of perylene, although it is produced from acenaphthene. It is a less common dye compared to related derivatives such as pigment red 190 (Vat Red 29). [3] [4]
The first anthraquinone-based synthetic vat dye was indanthrone (C.I. Vat Blue 4) - the synthesis of which was developed by René Bohn in 1901: Synthesis of indanthrone By dimerization of 2-aminoanthraquinone ( 1 ) under strongly alkaline conditions at 220-235 °C, intermediate stage 3 is obtained in two steps, which is cyclized ...
Vat Blue 36 is a vat dye that is chemically related to indigo. It is produced by condensation of 4-methyl-5-chloro-7-methoxy-3-indolinone and 5,7–dichloro-3-(2H)-thianaphthenone . [ 1 ]
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