Abstract:
Most of the knitted cotton fabric is scoured and bleached with caustic soda and hydrogen per oxide and dyed with reactive dye. For this reason caustic soda was used for scouring and sumifix yellow 3RS was used for dyeing of cotton fabric. To carry out the experiment 2.5,3.0,3.5 and 4.0 g concentration of NaOH was used to obtain the proper effect. Finally the samples were dried and tested to evaluate the performance. The experiment that was carried out for measuring the color difference with the help of spectrophotometer. To carry out the experiment2.5g/l NaOH was taken as standard and compared with others concentration e.g. 3.0, 3.5 and 4.0 g. It was found that as the concentration of NaOH increases, color difference decreases significantly. However for the economic point of view, best result obtained for 3 and 3.5 g of caustic soda. The experiments are done in Fakir Apparels Limited during my thesis work at 22th may 2012.
