This is amazing stuff!!! I was scared it wouldn't work, or to be too purple. I put it on pretty yellow roots, and whiteblond lengths a few strands. The roots are now a beautiful white ish blond, very close to white, and the strands I did are varying from a true white to a slight purple. Usually I keep this kind of dye in for an hour or more, this one I only left for half an hour; still more than recommended. It was just right for the roots! I used 3/4 tub for my roots, and had a bit left for the lengths. Normally with these dyes I use only a little bit, this was not the case with the white toner. Still amazing though!! Complete rave.