Hair color developers that help achieve the amount of lift or deposit required. 30V - Lighten 2-3 levels Matrix Professional OXYDANT is a quality peroxide that is optimized to get the best out of Matrix SoColor, WonderBrown, Wonder Color, WonderRed, and SoRed. The Matrix cream oxydant activates color Precursors as well as lightens the natural color pigments of the hair. Available in three different strengths of 20 vol (6%),30 vol (9 %) and 40 vol (12%) for different purposes of lightening and deposition. The Matrix oxydant 20 Volume (6%) is used to lighten 1-2 levels , coloring level on level, darkening hair, and covering grey hair. 30 Volume ( 9% ) is used to lighten 2 – 3 Levels, and 40 Volume ( 12 % ) for lightening 3 – 4 Levels. Mix with SoColor in 1.5 ratio and with WonderColor in 1:1 ratio.