Which hair type is most resistant to chemical relaxer treatments?

Coarse hair is most resistant to chemical relaxer treatments due to its thicker and denser structure. This hair type has a larger diameter and is often composed of more layers of cuticle, which can create a barrier that makes it more difficult for chemicals to penetrate effectively. As a result, coarse hair typically requires a stronger relaxer or more time and careful application to achieve the desired results.

Fine and medium hair types generally have a more delicate structure, which allows for easier penetration by relaxers. Colored hair, while it can also be weakened by chemical processes, does not inherently have the same level of resistance to relaxers as coarse hair does. Understanding the characteristics of different hair types is crucial for cosmetologists when selecting the appropriate products and techniques to ensure successful treatments.