Production of Fast Dyeings on Resin‐treated Wool

Abstract

The dyeing properties of wool treated with Hercosett 57 resin to render it machine‐washable have been studied. It has been shown that this reactive highly basic resin can greatly improve the dyeability of wool. Reactive dyes have excellent properties on this wool. Differential‐dyeing and fully continuous dyeing processes, using the special properties of Hercosett‐treated wool, have been studied.

Instrumental Colour Prediction A Potential Aid to Dye and Process Selection

“…The increase in the normalised modified KIS values of corresponding dyeings at pH 3 is consistent with the apparent increase in depth resulting from the high concentration of fixed dye present in the surface fibres [ 3 ] . Similar relationships are obtained with C.I.…”

“…The high order of washing fastness required on such treated wool may be met using the new ranges of fibre-reactive dyes; except for certain chrome dyes, traditional wool dyes tend to give dyeings that fad to meet IWS Superwash standards [ 3 ] . The high order of washing fastness required on such treated wool may be met using the new ranges of fibre-reactive dyes; except for certain chrome dyes, traditional wool dyes tend to give dyeings that fad to meet IWS Superwash standards [ 3 ] .…”

“…The relation between 'predictability' and dyeing perforrnance emerged in the further development of the IWS padbatch (cold) dyeing process [9]. Using the original pad-liquor, dyeings often appeared skittery and badly penetrated.…”

“…Addition of sodium bisulphite to the pad-liquor [9] markedly improved the performance of the dyes, giving level well-penetrated dyeings. This was accompanied by a greater accuracy in colour prediction.…”

“…These factors were highlighted by the introduction of machine-washable wool with which, in addition to the changed nature of the wool substrate, washingfastness standards demanded by the IWS often required the use of new fibre-reactive dyes generally outside the wool dyer's previous experience [3]. However, problems arise when the colourist is required to use new dyes in his recipes, to dye new substrates, or to operate a new dyeing process.…”