Acid washing, also known as stone washing, is a garment treatment technique that uses chlorine bleach to create a faded, worn-in look on denim and other fabrics. It was first popularized in the 1980s and has remained a popular fashion trend ever since.
Acid washing can be done on new or used garments, and it can be used to create a variety of different looks, from subtle fading to dramatic distressing. The process involves submerging the garment in a solution of chlorine bleach and water, and then agitating it to create the desired effect. The amount of time the garment is soaked in the bleach solution will determine the intensity of the fading.