Hydrogen Peroxide: Mastey’s Crème Developer is a stabilized hydrogen peroxide formulated with lipids to prevent dehydration to the hair structure during hair color process. Its gentle conditioning formula supplies the oxidation needed to develop the intermediate dyes (artificial pigment), and to decolorize the natural pigment (melanin granules) in the cortex.

Alkaline Agent (usually Ammonia): helps retain the hydrogen peroxide molecule longer in the hair to complete the development of artificial pigment to produce the new hair color. Also it opens the cuticle to allow the penetration of the hair color molecules.

The amount of ammonia varies from level to level system. Darker levels of artificial pigment have less ammonia and more pigment. Therefore their lifting ability is low. Lighter levels contain more ammonia and less pigment and more lifting ability.

The same applies to natural hair levels. Darker natural shades contain more pigment than lighter natural shades.

To achieve correct lift when starting from darker natural levels, a higher developer may be required

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