Wet processors (laundries) try to make garments look worn or faded by scraping or rubbing the surface of the fabric causing abrasion. Pumice stones are most frequently used. (see stone washing).
Laundry is a manufacturing company that takes unwashed jeans, and processes them. This processing includes washing, stone-washing, sandblasting, and garment dyeing. Read more..
tone washing is the process in which pumice stones added to wash cycle to abrade denim and loosen color.