Cross triangles will not be bleached.

Extended data:

Dry cleaning refers to washing clothes with organic chemical solvents, including removing oil stains or stains. Because water does not directly contact clothes in the process of washing clothes, it is called dry cleaning.

Bleaching, which means: 1, refers to the process that color negative changes the developed medicine film into halide after development in the development stage.

2. The process of bleaching and dyeing articles (mainly fabrics) into white by using chemical solvents.

3. One step of dyeing and finishing In recent years, the black heart cotton often reported by the media is made of bleached waste fabrics after being crushed. Generally, substances with strong oxidation have bleaching effect, such as sodium peroxide.