Hi i have a client who is a base 5 she had a previous reverse balayage with about 3 mounths growth. She want her base colour to a level 7. Do i lift her root with bleach first wash dry then apply colour or just put a level 8.01 with 20/vol 30/vol? Im just a bit concerned as colour does not lift colour and she wants her hair 2-3 shades lighter x suggestions plz