Since purple counteracts yellow on the color wheel, the purple pigments mask the yellow making the hair look lighter and brighter. When left on longer our purple shampoo can also reveal ashy silver tones again by eliminating the yellow.
The effects of our purple shampoo are not permanent it usually lasts 3-4 washes. The results vary depending on how your hair would adapt to the product and leave on time. We do offer a 100% money-back guarantee to anyone who is not satisfied with their purchase.