The Dyeing and Colour Characteristics of Alkali-treated Polyester Fibres Dyed with Disperse Dyes

Alkali-treated and untreated polyester fabrics (Dacron 54) were dyed for up to 6 h at 100 °C with a series of six disperse dyes of different chemical structures. The alkali-treated polyester samples adsorbed more dye and were dyed to deeper depths of shade and slightly different shades than was the untreated polyester. This study shows that significant differences between the molecular structure of the skin and core of melt-spun polyester fibres. Also includes correspondence entitled ‘Dyeability of Alkali-treated Polyester Fibre’ (JSDC, Vol. 107, May/June 1991, p. 218)