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A new method of pretreating cotton to improve its dyeability, using an aqueous solution containing polyamide–epichlorohydrin (PAE) resin and thiourea is introduced. The effect of dyebath pH on the colour yield, fixation and build–up of Procion HE, H and MX (ICI) dyes on the pretreated cotton, together with the quality of the dyeings obtained when using the new method and mechanistic implications, are discussed.
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Burkinshaw et al. (1990) studied this question.
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