Washing is an indispensable process in denim processing, and is the core of denim clothing effect. The main processing methods of washing include general washing, enzyme washing, rinsing, hand rubbing, pressing, sand blasting and monkey spraying. The main chemical reagents for high strength bleaching, snowflake bleaching, white printing and monkey are potassium high strength acid. The main use of potassium permanganate is in acidic conditions with a strong oxidation properties, can be denim, on the indigo oxidation and destruction, and make denim layout or all white, and show the washing effect.

The use of potassium permanganate bleached jeans can make the color of indigo dyed denim clothing become bright, overcome the disadvantage of bromine indigo dyeing chlorine bleached, make indigo more yan, more bright. At the same time, potassium permanganate bleaching, does not need to heat up, on the elastic cloth damage is very little, than the chlorine bleach loss risk is small, also quickly to achieve the bleaching effect, but there needs to be a reasonable ratio of potassium permanganate and phosphoric acid, to avoid the cloth yellow and waste solution bleach.