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Monoazo disperse dyes prepared from 2- and 3-aminonitrothiophenes were applied to three hydrophobic fibre types, furnishing reddish-blue to green and yellow to orange dyeings, respectively. Colour yields varied greatly: the dyes exhibited marked differences in build-up on polyester as a result of only small alterations in molecular structure, while the strengths of the nylon and diacetate dyeings...
A series of thienyl-2-azo dyes has been milled and the dispersions applied to polyester, nylon and cellulose diacetate by conventional exhaustion dyeing techniques. The colour properties of the dyeings were examined and related to the molecular structure of the colorants. Generally, of the three substrates, polyester was found to be coloured most effectively; the nylon and acetate dyeings had lower...
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