Dyeing of cotton fabrics with reactive dyes and their physico-chemical properties

The effect of dye concentration, electrolyte concentration, dyeing time and dyeing temperature on dyeing performance of cotton fabric dyed with reactive dyes, viz. Reactive Red 6B and Reactive Yellow RL, has been studied. The dye absorption increases with the increase in electrolyte concentration, dyeing time and dyeing temperature but decreases with the increase in dye concentration. Considering the effects of various external influences on the dyed cotton fabric, it has been observed that the Reactive Yellow RL imparts better physico-chemical properties than Reactive Red 6B in most cases.