My hair is really porous, I think porosity has a lot to do with it when it comes to Manic Panic, the ends, which were very porous at the time when I was really going for white blonde, they came out purple. It was definitely a platinum to purple ombre effect happening, except not so nice. That faded after a few shampoos. I used to use the Jhirmack purple shampoo, but I did find it to be rather drying.