Garments labeled as “dry clean only” should have water-resistant dyes that can withstand the dry cleaning process. Unfortunately, not all manufacturers follow this guideline.
Some dyes are water-soluble, resulting in discoloration when water-based cleaning agents are used to remove stains. When garments use two or more dyes, one dye may be more soluble during cleaning and will fade, resulting in a dramatic color change. Additionally, most dyes will fade with exposure to sun and artificial light. Shoulders, collars and sleeves on these garments will often show excessive fading.
Common household products such as toothpaste, shampoo, hairspray, perfume and deodorant can cause spots of color loss that may not be apparent until after dry cleaning.