Wisconsin Barber Practice Exam 2026 - Free Barber Practice Questions and Study Guide

Question: 1 / 400

What is the primary ingredient in most hair color products?

Hydrogen Peroxide

Alcohol

Ammonia

The primary ingredient in most hair color products is ammonia. Ammonia is a key component because it acts as an alkaline agent that opens the hair cuticle, allowing the color to penetrate the hair shaft effectively. This is essential for both permanent and semi-permanent hair color formulations. By raising the hair's pH, ammonia creates an environment suitable for the dye molecules to enter, which helps achieve the desired color result.

While hydrogen peroxide is also a common ingredient in hair coloring products, especially for its role in lifting the natural pigment (lightening), it is not the primary ingredient responsible for the color application process. Alcohol and glycerin, on the other hand, serve different purposes in the formulation; alcohol can act as a solvent, while glycerin often functions as a moisturizing agent. However, neither is the primary component in achieving hair color.

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Glycerin

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