Crisha
New Member
I have been using Wella Koleston Perfect 5/1 on a client for a couple of years. The new formulation (Me+) came out much lighter (client not happy) maybe because I used the ‘old’ developer. Do you think that’s the reason? If not, what do you guys recommend to achieve the old 5/1 shade? Mixing the 5/0 and 5/1 1:1 of the new formulation? Please advice.