Pure cotton bundle is first cleaned and bleached before coloring it to clear impurities and also to obtain bright white cotton yarn. Huge boilers are used to do the bleaching process. Initially, water is boiled in boilers and soap oil is added to the boiling water. Now the bundle of cotton yarn is boiled in the solution and removed. The cleaned cotton is again dipped in hot water and dried. The cleaned cotton is sent for dyeing unit for coloring process.