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The ideal partner for wella permanent colours and lighteners. Available in different volume for all the services possibilities (1.9%, 4%, 6%, 9% and 12%). Specifically reformulated to achieve the most accurate colour, redesigned to provide optimal consistency with new Koleston Perfect. Easier and faster mixing, precise application, great foil adhesion, easy rinsing and a comfortable client experience. The 6% Welloxon Perfect 20 volume hair developer is created to achieve the best color results. It lifts the hair by one or two levels. Optimal consistency with new Koleston Perfect Easier and faster mixing Precise application Great foil adhesion Easy rinsing The Welloxon perfect developer offers a comfortable client experience