FACTORS AFFECTING THE COLOUR YIELD OF AN ACID DYE ON NYLON FABRIC

AUTHOR: NNOROM, ONYEKACHI ONYINYECHI (M,ENG)

DEPARTMENT: POLYMER AND TEXTILE  ENGINEERING

AFFILIATION: FEDERAL UNIVERSITY OF TECHNOLOGY OWERRI

The factors that affect the colour yield of an acid dye on nylon fabric were investigated at a constant temperature of 500C, using C.I. Acid Yellow 23,with citric acid and sodium chloride as auxiliaries. It was observed from the absorbance results that the colour yield of C.I. Acid Yellow 23 improved with increase in time of dyeing, while the absence or increase beyond 1% (acid) and 5% (salt) reduced the colour yield of the acid dye on the nylon fabric. Also, at a constant dyeing time of 10minutes, the absence or increase in salt beyond 5% had the most effect of reducing the colour yield. The results also show that for any given time of dyeing in this study, colour yield improved when salt and acid concentrations were constant at 5% and 1% respectively.

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