Wella Welloxon Perfect 9% 30 Volume Creme Developer For Koleston Color 33.8 Ounce 1000 Milliliters Koleston Perfect is the first professional hair color brand with ME+ Technology. This permanent hair color offers pure, balanced color results with natural depth and shine. This hair color reduces the formation of free radicals and offers irresistible hair quality. Gives up to 100% grey coverage and 5 levels of lift. Use the mixing rate of 1:1. ME+ is present in specific shades of Pure Naturals, Rich Naturals, Vibrant Reds, Special Blondes, and Deep Browns of the Koleston Perfect brand. ATTENTION: These products require professional expertise. Seller is not liable for any adverse outcome resulting from the use of this product.