Can I use this on recently bleached or chemically treated hair without damage?

The formula is a tinting shampoo, not a reconstructive treatment, so it doesn’t repair bleach damage. However, because bleached hair is highly porous, it will grab the pearl pigment much more intensely than untreated hair — often resulting in a cooler, sometimes almost violet-tinged tone if left on too long. If your hair was lightened in the past two weeks, do a strand test first: apply a small amount to a damp hidden section, wait the minimum recommended time, rinse, and evaluate. If the tone looks good, proceed; if it’s too strong, shorten the contact time or dilute the shampoo with your regular shampoo 1:1. Avoid using it on the same day as a chemical service (perm, relaxer, fresh bleach) — give the scalp and cuticle at least 48–72 hours to settle. If your scalp is sensitive or shows any irritation, rinse immediately and discontinue use.