β-Cyclodextrin as retarding reagent in polyacrylonitrile dyeing

β-Cyclodextrin was tested as a dye complexing agent – as a dye retardant in the dyeing of PAN fibres with cationic dyes. Significant improvement of colour uniformity and some improvements in colour depth were observed when PAN fibres were dyed in the presence of β-cyclodextrin as compared to dyeing in the presence of a commercial retardant.