Welloxon perfect is a creme developer formulated for use with Koleston Perfect and also the recommended developer to be used with Magma and Blondor products. Compare with similar items This item WELLA WELLOXON PERFECT PEROXIDE DEVELOPER 12% 40VOL , 9% 30Vol, 6% 20Vol, 4% 13Vol & Pastel 1-2 1.9% 6Vol 1000ml