Recommendation Combine with Welloxon Perfect for excellent, perfectly opaque results. Koleston Perfect & Welloxon Perfect (1:1). Ratio for special blonde shades (1:2). Mixing ratio: 3 tone brightening: 1 part Koleston Perfect, 1 part Welloxon Perfect 12% 2 tone brightening: 1 part Koleston Perfect, 1 part Welloxon Perfect 9%, 1 tone lightening/grey/white coverage with the same depth or darker: 1 part Koleston Perfect, 1 part Wello. xon perfect perfect 6% Special Blonde: 1 part Koleston Perfect, 2 parts Welloxon Perfect 9% or 12% Perfect for all dyeing techniques. Same depth or dark: full dyeing, first use: moisten the hair. Spread the colour from root to tips and comb hair evenly. Exposure time: heat: 30-40 minutes. / + heat*: 15-25 minutes. LIGHTENING: First time full head application, medium lengths and tips: comb the product through the medium lengths and tips. Exposure time: heat: 20 minutes. / + heat*: 20 minutes. Roots area: Apply the colour to the hairline Exposure time: heat: 30-40 minutes. / + heat*: 15-25 minutes. * Climazon