Oxydant (6%) 20 Volume Developer opens the hair cuticle but unlike 10 volume, it provides lifting of the hair by one to two levels. For instance, if you have more than 50% gray hair, 20 volume developer is the only developer to use for 100% gray coverage and a long-lasting color.

Oxydant (9%) 30 Volume Developer also works like 20 volume, but it will lighten the hair’s original color by two to three and is more efficient when the desired color is no more than two levels lighter than the original color. Choose a 30 volume developer when you want a developer that is stronger for a lighter and deeper color.

Oxydant (12%) 40 Volume Developer is the strongest and has the potential to produce significant changes. It will lift your hair four shades and is suitable for blondes, especially high-lift colors. You can use 40 volume developer when you want to achieve a medium to dark blonde. You can also use it with bleach for better results. However, use it carefully to avoid adverse effects that may arise due to its strength.

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