- Professional permanent coloring with ME+ molecule to reduce the risk of developing new hair color allergies Your best ally in permanent coloring by Wella to obtain an ultra-precise color result. With Koleston Perfect it is not necessary to carry out any pre-treatment to neutralize the action of the metals. Although the risk of developing a new allergy is reduced, the risk of an allergic reaction, even a serious one, remains. Always ask your hair stylist to perform a skin sensitivity test 48 hours before each color service. If you have already had episodes of allergic reaction to hair color you should not color it. The ME+ molecule is present in some shades Pure Naturals, Rich Naturals, Vibrant Reds, Special Blondes and Deep Browns by Koleston Perfect. Dermatologically tested against sk.
eBay