Indiana State Beauty Practice Exam

In hair coloring, what does the term 'oxidation' refer to?

1. The process of fading hair color

2. The chemical reaction when dye interacts with hair

3. The application technique of hair dye

4. The time required for dye to set

The correct answer is: The chemical reaction when dye interacts with hair

In hair coloring, the term 'oxidation' refers to the chemical reaction that occurs when the hair dye interacts with the hair. This process is essential because it involves the dye developer, typically containing hydrogen peroxide, which activates the color molecules. Oxidation allows these molecules to penetrate the hair shaft and bond with the hair, resulting in the desired change in color. Understanding oxidation is crucial for anyone working with hair coloring products, as it directly affects the outcome of the coloring process. It is also important to recognize that different hair types and conditions may influence how effectively oxidation occurs, impacting color intensity and longevity. The other aspects mentioned, such as the process of fading hair color, the application technique, and the time required for dye to set, do not accurately capture the fundamental chemical process involved in hair dyeing. Each of these might have their own significance in the overall process but does not define 'oxidation' specifically.