The results from Ion is amazing, it covers your gray, leaves your hair feeling so soft and healthy, you don't have to worry about it damaging or breaking your hair.
Can you leave hair dye on too long?
If you leave hair dye in longer than the recommended time this can cause damage to your hair. The chemical process can result in hair that is fragile, dry, and brittle. 30 minutes is usually long enough for the chemicals in a permanent hair dye to develop and permeate the hair.Jun 16, 2021