I need to perform an incompatibility test but only have Schwarzkopf Perm lotion and welloxon hydro peroxide. does it matter if there different names or should they be from the same brand?
I also need to mix some bleach powder and Hydro peroxide for some highlights and they don't have the bleach powder in wella and I'm using all wella products.
I also need to mix some bleach powder and Hydro peroxide for some highlights and they don't have the bleach powder in wella and I'm using all wella products.