A hair developer is a hydrogen peroxide-based solution used to activate hair color and help it penetrate the hair shaft. It determines how much the hair cuticle opens and how much lift (lightening) is achieved during coloring.
When mixed with hair color, the developer releases oxygen. This oxygen:
The strength of the developer determines the intensity of this reaction.
| Developer | Lift Level | Best Use |
|---|---|---|
| 20 Vol | Low | Grey coverage |
| 30 Vol | Medium | Lightening |
| 40 Vol | High | Bleaching |
Selection depends on:
Professional brands like Yuthika Professional recommend specific developer combinations for optimal results.
Hair developer is essential for activating hair color. Choosing the right volume ensures both safety and effective results.

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