Slay the North Dakota Cosmetology Exam 2026 – Get Stylish, Get Certified!

Coarse hair is the type most resistant to chemical treatments due to its thicker and denser structure. The larger diameter of coarse hair provides a more substantial protective barrier against chemicals, making it less susceptible to alterations in texture or color. This is important to note because the cuticle layer in coarse hair is more robust and tightly bound, which can require more potent formulations or longer processing times for effective results with chemical treatments.

In contrast, fine hair has a smaller diameter and a thinner cuticle, which can make it more susceptible to damage from chemical processes. Medium hair falls somewhere in between but still lacks the natural resistance exhibited by coarse hair. Curly hair can vary in texture, but it often also possesses finer strands that can be more vulnerable to chemical treatments, especially if not properly cared for during the process. Understanding the unique characteristics of different hair types helps professionals choose the appropriate products and techniques for delivering safe and effective treatments.