Evaluation of colour fastness properties of natural dye extracted from Symplocos racemosa (Lodh) on wool fibres using combination of natural and synthetic mordants

摘要

The colour fastness properties of colourant on wool fibres dyed with natural dye extracted from the leaves of Symplocos racemosa have been studied using combination of mordants such as lemon juice + copper sulphate, lemon juice + potassium dichromate, lemon juice + ferrous sulphate and lemon juice + stannous chloride in the ratio of 3∶1, 1∶2 arid 1∶3 separately. Dyeing along with mordanting techniques which included pre-mordanting, simultaneous mordanting and post mordanting has been carried out. Study on fastness tests of dyed clothes is also undertaken. Large range of shades is obtained because of varying mordant ratios and combinations. The wash, rub, light and perspiration fastness of the dyed samples have also been evaluated, giving fair to excellent fastness grades.