Dye migration influences on colour characteristics of wool fabric dyed with acid dye

The influence of non-ionic auxiliaries on absorption of the acid milling CI Acid Blue 80 dye on wool fibre and on the colour changes of dyed fabric has been investigated The kinetics of dye absorption and the colour characteristics of dyed fabric, including washing fastness, were determined. A non-ionic surfactant based on poly-ethoxylated alkylphenol enables dyeing at low temperatures, colour characteristics and wash fastness to be improved, whereas the alkylaminoethoxylated product enhances the dyeing rate at higher temperatures. The variation of colour yield values in the dyed fabric which occur due to the use of non-ionic auxiliaries or the difference in dyeing temperatures is explained and discussed.