High Volume Developer. Hair developer has several degrees to which you can lighten or darken your hair. The weakest one is 10 volume or 3% peroxide developer and normally, 3% in the developer helps to achieve 1 degree of lightening. So, with 6% peroxide, colorists can get 2 degrees of lightening. In other words, the developer lifts your hair color by one or two.
Opt for volume 30 developer to change your color by 3 to 4 shades. Volume 30 contains 9% hydrogen peroxide and is ideal for altering your hair several shades. The higher number volume means that you will get more color penetration into. All hair color kits in beauty stores and specialized hair care stores come with 20 volume developer, except the extra light blonde kits which come with 30 volume developer. There are different level developers, for example 10, 20, 30, 40 and 50 volume traders. We recommend using the 20 volume one if your hair is more on the lighter side. A higher volume developer (at least a 30) will be needed to give you the lift you need. With permanent dye, you can use a 10 volume developer. Unfortunately, the effects may not be as expected because it does not nicely lift the color.