Dyeing of Cotton with Direct Dyes

Introduction:

Direct dyes are one of the most versatile classes of dyestuff applicable to cellulose, wool, silk, nylon fibers. This dyes have inherent substantivity for cotton, and for other cellulosic fibres. Their aqueous solutions dye cotton usually in the presence of an electrolyte such as NaCl or Na2SO4. The light fastness of dyeings with direct dyes on cellulosic fibers varies