I’ve used this mask twice now, the first time I left it on for about 20 minutes and the effect was super subtle. It left my hair feeling lovely and soft, but it didn’t do much to neutralize the brassiness of my dyed brown hair. The second time I left it on for closer to 35 minutes, and although it was slightly more effective in toning down brassy tones, the result wasn’t as dramatic as I had hoped. Not sure I would repurchase, I’ll try some other options first.

Really does what it says it will; I have highlighted brunette hair and it doesn’t touch the blonde obviously (I use a separate blonde toner) but it really does tone down my brunette roots and lowlights, so I’m very pleased. Has multiple uses, I’ve gotten about 4 washes from it so far.

not grate still red tint after using product

I purchased this item with the hope to turn my Brunette hair into an ash colour. however after having applied the product for 5 minutes my hair has turn GREEN. Hugely disappointed- my hair is now ruined

Best product I’ve used for getting rid of brassy tones. I left it on for the full time frame recommended. All the reddish/copper like colour went although it did my my hair go a very dark brown. I like the darker colour but maybe if you don’t want your colour to go very dark leave it on for a lesser time frame. The residue is much less than other blue shampoos I’ve used and any little bits of staining easily come off the skin with makeup remover. The bottle is a lot smaller than I expected but I understand it lasts three to five washes and I would say I could get three uses out of the one bottle. I have medium length hair but it is quite fine. If you have thick long hair maybe you’d only have two uses. Overall it’s brilliant and does exactly what it promises. Would Highly recommend.