This hair dye uses Pure Balance and ME + technology to ensure bright, even-looking and intense colour results with 100% grey coverage. The formula offers up to 3 levels of lift (and up to levels of lift with Special Blonde). A simple 1:1 mixing ratio with Wella Welloxon Perfect ME+. It reduces the risk of developing new allergies to hair colour and results in less damage to colour-treated hair. For a natural and perfect finish.