Comparative study between two types of electrolyte used in the reactive dyeing of cotton

The aim of this paper was to compare the efficiency of two type of electrolyte in the dyeing of cotton fabrics with reactive dyes. Factors affecting dye ability such as salt concentration, and fastness performances such as alkali concentration were studied. The colour yield K/S and colour fastness of the dyed fabric using sodium sulfate were comparable to those obtained with sodium chloride. However, the exhaustion and the fixation time were shorter and the diffusion coefficient was lower in the case of sodium sulfate.