Idaho Barber Licensure Practice Exam 2026 – Your Complete All-in-One Resource for Exam Success!

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When coloring hair, what is the role of a developer?

To lighten the hair

To activate the color and help it penetrate the hair shaft

The role of a developer when coloring hair is to activate the color and help it penetrate the hair shaft. Developers typically contain hydrogen peroxide, which not only opens the hair cuticle but also facilitates the chemical reaction necessary for the color to bond with the hair. This process ensures that the dye molecules are able to enter the hair structure, allowing for a longer-lasting and more vibrant color result.

While lightening the hair occurs during the coloring process, it is primarily a secondary effect of the developer’s action, rather than its main purpose. Nourishing the hair and adding shine are benefits that can result from conditioning treatments or specific shampoos and serums, but these are not functions of the developer itself in the context of hair coloring.

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To nourish the hair

To add shine to the hair

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