Alaska Hairdresser and Barber Certification Practice Exam

How does the pH scale affect hair coloring?

1. Higher pH opens the cuticle

2. Lower pH helps the cuticle to close

3. pH has no effect on color

4. pH affects only the texture

The correct answer is: Lower pH helps the cuticle to close

The pH scale plays a significant role in hair coloring techniques, particularly in relation to the hair cuticle. A lower pH can help the cuticle, which is the outer protective layer of the hair, to close and smooth out. When the cuticle is closed, it not only helps to lock in color but also contributes to a shinier, healthier appearance of the hair. This interaction is crucial in hair treatments; for instance, using products with an acidic pH after coloring helps to neutralize the alkaline agents in color formulations, ultimately resulting in better color retention and less damage. When the cuticle is sealed tightly, it minimizes moisture loss and increases resistance to environmental factors. This is why the understanding of pH balance is key in achieving optimal results in hair coloring processes.