Colorants and Auxiliaries: Organic Chemistry and Application by J. Shore

By J. Shore

Concentrates at the chemical features of dyes and pigments, with emphasis on makes an attempt to interpret their colouring and fastness houses when it comes to the basic structural positive aspects of colorant molecules.

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Additional info for Colorants and Auxiliaries: Organic Chemistry and Application Properties: Colorants

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Oxidation dyeing was simply the in situ formation of a polymeric black or dark brown azine colorant of indeterminate constitution by acidic oxidation of a simple arylamine such as aniline or p-phenylenediamine on the fibre, using a chlorate or dichromate as oxidant and a copper salt catalyst. Although no longer significant in textile dyeing or printing, coloration techniques of a similar kind have remained the primary method of colouring human hair, feathers and natural furs. 16 Ingrain dyes This is another somewhat ambiguous category in the context of the Colour Index classification, but fortunately it is now merely of historical interest.

Accidents must have occurred frequently, reminding victims and supervisors alike of the penalties suffered if hazardous chemicals were handled carelessly. More insidious, however, were the potential health risks resulting from longer-term exposure to certain organic and inorganic chemicals. Operatives were expected to provide and wash their own working clothes. These must have become heavily contaminated with chemical stains, putting the worker’s family also at risk of exposure to hazardous vapours [65].

Operatives were expected to provide and wash their own working clothes. These must have become heavily contaminated with chemical stains, putting the worker’s family also at risk of exposure to hazardous vapours [65]. It was not until the 1940s that the connection was made between the high incidence of bladder cancer in employees of dye-making and dye-using firms and their exposure to certain arylamines, following epidemiological studies of individuals who had spent their working lives in these industries.

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