Method of Dyeing

Method of Dyeing

Direct green 27 and Direct Red 28 were dissolved at first by making paste with little distilled water and then by adding cold distilled water, the dye baths were prepared by taking 5 % dye concentration and 5% electrolyte (Na2SO4) concentration (on the basis of weight of okra fibre). The fibre-liquor ratio was maintained at 1:50. Before immersing the fibre in the dye bath it was treated well in distilled water and squeezed for even absorption of dye particles. Dyeing temperature was fixed at 70°C and it was continued for 60 min. The dye bath was occasional stirring by a glass rod and then allowed for further 30 min as the bath cools down. During dyeing the dye bath were slightly alkaline with 2% sodium carbonate solution to attain the fast reaction and also hot distilled water was added to the dye bath in order to maintain the fibre-liquor ratio 1:50 throughout the experiment.