A hair developer is a creamy substance mixed with hair bleach or dye to lighten or color the hair. It's a crucial component in the hair coloring process, as it dictates the intensity of the color change. The key ingredient is hydrogen peroxide, which facilitates the chemical reaction that alters the hair's color.
Understanding Hair Developer Volumes
The volume of the developer refers to the concentration of hydrogen peroxide, and this significantly impacts the results:
- 10 Volume (3% peroxide): Deposits color and provides minimal lightening (about one shade). Ideal for covering grey hair or toning.
- 20 Volume (6% peroxide): Lightens hair by approximately two shades. A popular choice for covering grays and enhancing existing color.
- 30 Volume (9% peroxide): Offers more significant lightening (up to three shades). Suitable for more dramatic color changes.
- 40 Volume (12% peroxide): Provides the most significant lightening (up to four shades). Use with caution, as it can be harsh on hair.
Different volumes are selected depending on the desired outcome and the hair's current condition. Using too high of a volume can damage hair, leading to dryness and breakage.
Developer and Bleach vs. Developer and Dye
- Developer and Bleach: The developer acts as an oxidizing agent, enabling the bleach to lift the existing hair color, allowing for significant lightening.
- Developer and Dye: The developer helps the dye molecules penetrate the hair shaft, ensuring optimal color deposition and longevity. Without a developer, the dye might not effectively bind to the hair, resulting in dull or washed-out color.
Choosing the correct developer volume is essential for achieving the desired results while minimizing potential damage. Always follow the manufacturer's instructions for the specific hair dye or bleach being used.
