<p>Use of a cationic polymer in the treatment of textiles to improve dye fixation in textiles, characterised in that the cationic polymer is a linear cationically substituted quaternary ammonium salt according to the following Formula (I): wherein, x is from 0 to 3 and the ratio of y:n is in the range of from 0.01 - 0.5 (i.e. n:y is from 100 to 2), provided that y ? n.</p>
