Direct Dyes

Direct Dye is a class of dyestuffs that are applied directly to the substrate in a neutral or alkaline bath. The direct dyes are one of the cheapest groups of dyes used for dyeing cotton and other cellulosic materials. They produce full shades on cotton and linen without mordanting and can also be applied to rayon, silk, and wool. Direct dyes give bright shades. Also, Direct Dyes are molecules that adhere to the fabric molecules without help from other chemicals. Direct dye is defined as anionic dyes with substantivity for cellulosic fibers, normally applied from an aqueous dyebath containing an electrolyte, either sodium chloride (NaCl) or sodium sulfate (Na2SO4).