As was for a self-experiment, my approach to bleaching after rinsing out the bleaching of approach YELLOW, the shock was deep. So I'm going and I bought this shampoo. I must say, it is clearly to remove the best product to a yellowish tinge from the hair. I've tried many products that promised to neutralize a yellow tinge, but it has nothing helped - particularly drug products were an imposition. A lot of money for nothing. But the shampoo is a concentrate, which is why you should not actually apply it on freshly bleached hair, the addition to the shampoo is rinsed with blond hair immediately. That being said, if you wash it after this procedure that lasts with the removal of the yellow tint some weeks. Since my dilemma was so great, however, that I hardly dared to the street, I looked as if I had a Gouda on the bulb, I did not stop me the instructions and have the shampoo the first time on wet hair about 3x 3 minutes left on it (within a laundry!). My yellowness is thus disappeared immediately, my hair is very bright blond without a Gouda-yellow-approach. So if there is a real emergency like me, can it make the product longer. But watch out for really light hair! Since the hair is silver within a minute! But all in all a great product, especially the smell, reminds me of violets.