My 11 year old dd has waist legnth red hair. She wants to dye it bright red (pillar box!) for red nose day. I have questions. Is it possible to do this without using a permanent colour? If there is a semi permanent solution how long will it take to wash out and will it wreck the condition of her hair in the process? We've used spray colour before, but we've never been able to get any inensity of colour. Am I doing something wrong, or using the wrong brand or something? And finally, anyone got any tips on how to talk her out of it?!