Hi I have a friend who wants a hugeish colour change. She is natural base 5, just put on 5.62+4 on the roots down to 6.62 and magenta red for a red multitonal dip dye effect which looks lovely. But she wants to go for a bright purple dip dye but her hair is fineish and i'm worried about condition. So what is the best colour stripper to use? And whats the brightest purple you guys have used? Sorry it's such a long post!!