Why is some colour loss only apparent after drycleaning?

There are many substances that can remove the colour from fabric or even change the colour. For instance alcohol from hair spray, perspiration can react with dyes in garments, being splashed with cleaning chemicals or pool chemicals. Often this type of damage is not noticeable until after the dry cleaning.

If you are splashed with a cleaning solvent, for instance, and the solvent dries without being dabbed or rubbed the solvent may have loosened the colour but when dried remains intact. When the article is cleaned the loosened colour will be washed away in the dry cleaning solvent leaving behind a spot that wasn’t there when you dropped the garment off. More.

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