Hi geeks. I have a lady I’m going to do tomorrow. Her previous hairdresser no longer wants to do her hair and she now wants me to colour it for her. She has given me the formulas she uses (she messaged her hairdresser as she loves the colour and wants to keep it. She does full head of meche (I use foils which is fine) but her old hairdresser does bleach with 40 vol and uses ula+ with 40 vol. she just does her roots in the foils. But I’m no way using bleach and 40 I’ll be using bleach and 20. I’m just concerned about the ula+. I’ve never used it before but I’m so concerned it will turn my ladies hair blue if I get any of it on her already blonde hair!!!!! Help please