To dye the given woolen material using acid dyestuff with the required percentage of dye.
The given woolen material is weighted accurately. The dye bath is prepared by pasting the dyestuff with sulphuric acid and water. The material is then steeped in the dye solution at 50o c. sodium chloride is added in two portions and dyeing carried for 60 minutes at 100o c. Then it is subjected for soap wash, cold wash with water and it is dried.
The given woolen sample material was dyed with acid dye.