Kerastase – Blond Absolu Bain Ultra-violet Anti-brass Purple Shampoo 8.5 fl. oz.

Kérastase Blond Absolu Bain Ultra-Violet Anti-Brass Purple Shampoo is a purple toning shampoo designed specifically for blonde, bleached, highlighted, or gray hair.

It works by using violet-blue pigments to neutralize unwanted yellow and brassy tones that can develop over time in lightened hair. This helps restore a cooler, brighter blonde or silver appearance after washing.

Beyond toning, it also focuses on hair care and protection. The formula is enriched with nourishing ingredients (including hyaluronic acid and edelweiss flower extract in the Blond Absolu range) to help hydrate the hair fiber, improve softness, and reduce dryness that often comes with bleaching.

In regular use, it’s typically applied once or twice a week, left on the hair for a short time (often 2–5 minutes depending on the level of brassiness), then rinsed out. It’s not meant for daily use, since overuse can slightly shift hair tone cooler or slightly lavender on very light hair.