Updated: Mar 13, 2021
To dye the given cotton material using direct dyestuff with the required percentage of dye.
The given cotton material is weighted accurately. The dye bath is prepared by pasting the dyestuff with sodium carbonate and water. The material is then steeped in the dye solution at 40o c. half the amount of sodium chloride is added after 15minutes of dyeing and the temperature of the dye solution is increased to 100o c and then the remaining amount is added and dyed for another 45 minutes. Then it is subjected in the cooling bath for obtaining better exhaustion and it is dried.
The given cotton sample material was dyed with direct dye.