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How does 40 volume developer work?

40 volume developer is a lightening agent that contains 12% peroxide. You can mix it with bleach to create a platinum blonde or with permanent hair color to lighten your hair while dyeing. Developers work by lifting the cuticle layer of your hair. The higher the volume, the more the cuticle is lifted. This lifting is what lightens your hair.

What is the difference between Volume 30 & 40 developer?

• Volume 30 Developer (30V / 9% peroxide) lifts the hair up to 3 levels higher and is commonly used with lightener. • Volume 40 Developer (40V / 12% peroxide) will take the hair up to 4 levels lighter. It is often used with lighteners or high-lift blondes and may be needed for hair that is dark.

How to use 40 volume Creme developer?

1. Mix the 40 Volume Creme Developer with hair coloring agent. 2. Apply the mixture to hair for strong lightening action and lightening lift without color deposit. Looking for specific info?

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