The dyed cotton fabrics after dyeing are usually treated with different auxiliaries to impart desirable properties according to their commercial uses in industries. An attempt has been made to improve the wash fastness and colour properties of eleven non-benzidine direct dyes based on 4,4'-diaminostilbene-2,2'-disulphonic acid. The effectiveness of three fixing agents used was determined by comparing the properties of treated and untreated dyed substrate. All the three fixing agents showed beneficial effects on these properties as assessed by ISO CO 5 wash fastness and on the colour properties like tristimulus values, CIE L*a*b* co-ordinates, chromaticity co-ordinates and Munsell values. Use of these fixing agents improved the wash fastness of these dyes on cotton as well as the brightness and strength of the colour in a similar pattern.
C M ASHRAF ,S WAHEED ,
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