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Environment Friendly Approach  to Simultaneously Remove Unfixed Dyes from Textile Fabric and Wash-off Liquor

Research and development

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Nr DOI: 10.5604/12303666.1196622

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Abstract:

A new idea was investigated in this study wherein the use of coagulants was assessed in the wash-off process to simultaneously remove unfixed reactive dyes from fabrics and washoff liquor. At the end of dark shade dyeing (5% owf) with C.I. Reactive Yellow 145, C.I. Reactive Red 194, and C.I. Reactive Black 5, fabrics were subjected to both conventional and new wash-off methods, and comparisons were made. The effectiveness of coagulant wash-off was evaluated in terms of the change in shade, wash fastness, rubbing properties, and colour difference values (ΔL*,ΔC*, Δh* & ΔE*). The colour removal efficiency (%) of liquor was considered as indicative of the removal of unfixed dyes from the fabric. Overall results have shown that the use of alum and MgCl2 coagulants during the wash-off process can achieve up to an 87% reduction in the colour of wash-off liquor, without compromising the colour properties of the dyed substrate.

Tags:

coagulants, wash-off, reactive dyes, unfixed dyes, colourfastness.

Citation:

Shaikh IA, Muqddas A, Jamil N, Qadir A. Environment Friendly Approach to Simultaneously Remove Unfixed Dyes from Textile Fabric and Wash-off Liquor. FIBRES & TEXTILES in Eastern Europe  2016; 24, 3(117): 124-129. DOI: 10.5604/12303666.1196622

Published in issue no 3 (117) / 2016, pages 124–129.

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