The oxidation cream is a creamy liquid that activates the dye. One of the most important elements of hair coloring is the selection of the correct oxidation cream. Suitable for all hair types; resistant, natural or sensitive. For professional use. 10 Vol. Oxidation cream: For same shade and darker shade hair coloring. 20 Vol. Oxidation cream: For gray coverage, bleaching up to 1-2 shades and same shade hair coloring. 30 Vol. Oxidation cream: For bleaching up to 2-3 shades. 40 Vol. Oxidation cream: For bleaching up to 3-4 shades and applications of highlighting and balayage.