"Distressed" and "natural" are the core charms of denim clothing style, and washing is an essential process to achieve this look. The main processing methods for washing denim clothing include general washing, fermentation washing, rinsing, hand rubbing, wrinkling, sandblasting and spraying (Maliu Water spraying). The main chemical used in the rinsing process of high manganese bleaching, fried snowflakes, white discharge printing, spraying (Maliu Water spraying) and other treatments is Potassium Permanganate.

Potassium Permanganate (KMnO₄) has strong oxidizing properties and is the only chemical agent that can quickly and thoroughly destroy the indigo and sulfur dyes on denim clothing at room temperature. After the dye is completely removed, the cloth surface is white, and after partial destruction, the cloth surface color is gray. Its treatment effect and style have not been replaced by other chemical agents.