Wella Welloxon Perfect 12% 40 Vol. Suitable for getting the result. Oxidant selection: 6- 20% Volume Oxidant: Suitable for dark dyeing-toning and light dyeing up to 1 tone. 9- 30% Volume Oxidant: Suitable for lightening the hair up to 2-3 tones. 12- 40% Volume Oxidant: Suitable for lightening the hair up to 2-3 tones. Suitable for opening up to 3-4 or 5 tons