:0 kill the scalp!! I don't agree with 40 vol on scalp but their are something I do that others don't agree with either. I suppose you will always get that in this industryIf the hair was short I'd have used at least 30vol or even 40vol and then toned with SPA, SPV, SPN or 10A/N/AV
I know people are going to say bot to use 40vol on scalp but in 25yrs I've never had a problem. I would now rebleach with 20vol, tone as mentioned above and then use Cera Repair Fortetherepie to put the protein back into the hair. It is often said that 2 lots of 20vol is better than going in wi one lot of 40vol anyway.
Hope it goes well.
I agree. The lower the volume, the better the lift. All 40 vol (12%) does, is shock the cuticle and give a brassy lift.Bad bad bad practise. You will get same result just using 20vol and leaving on for longer, except you won't fry the clients hair or scalp. Plus, if you do burn your client at 40vol, your insurance wont cover as it's advised you don't use 40vol scalp. Bad advice.