Wella has developed their purest colour, utilising ME technology that delivers a pure, balanced colour, with customers up to 60 times less likely to develop a new allergy to Wella’s new hair colour range. After intensive testing the new Koleston Perfect range provides a natural depth and shine; while causing less hair damage than traditional tints. With a simple 1:1 mixing ratio, proven 100% grey coverage and up to 5 levels of lift! While ME technology massively reduces the risk of developing an allergic reaction to these colours, it is not for use by people allergic to hair colourants. Wella has developed a high-quality tint, that delivers vibrant colours and total coverage!