The principle of rinsing with Cl2The principle of the rinsing process was that the reaction of the reagent with water would produce hypobaric acid (HClO), which was highly oxidistic. When the Cl2 gas encounters a wet colored substance, the hypobaric acid can vaporize it into a colorless substance, thereby achieving a rinsing effect. The effect of the bleachings was permanent, meaning that the bleached substance could not restore its original color. Therefore, the principle of the rinsing of the Cl2 gas was to achieve the rinsing process by vaporizing the colored substances into colorless substances.