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Nylon 6.6 was dyed with five commercial sulphur dyes at different pH values and various temperatures. It was found that over the pH range 6-12, maximum colour strength was achieved at pH 7 and the colour of the dyeings was influenced by the pH at which dyeing had been carried out. The latter observation was explained in terms of the effect of pH on the state of reduction of the dyes and their subsequent...
Nylon 6.6 was dyed with five commercial suphur dyes using seven different reducing systems and three oxidation systems and the dyeings were subected to repeated wash testing and to light fastness assessment. It was found that the different reductants effected not only the colour strength of the dyeings but also influenced the colour of the dyeings. Two of the reducing systems studied had a deleterious...
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