L'Oréal INOA Rich Oxidant is available in 10, 20 or 30 Volumes, depending on the desired effect. The rich oxidant must be mixed with the INOA Technology ODS2 coloring jelly. - 10 Vol Oxidant for tone-on-tone coloring - 20 Vol Oxidant to cover white hair and lighten up to 2 tones. - 30 Vol Oxidant to lighten up to 3 tones.