Nevada State Board of Cosmetology Practice Exam

Coarse hair is typically more resistant to chemical processing due to its larger diameter and denser structure, which makes it less permeable to chemicals. The cuticle, or outer layer of the hair, is thicker and more tightly packed in coarse hair strands, contributing to this resistance. This means that when applying chemical treatments like coloring or perming, more time and stronger formulations may be required to achieve the desired results compared to finer hair types. Coarse hair can also retain its shape and structure better after such processes, making it an important consideration for hairstylists when determining the approach for chemical services.

In contrast, fine hair has a smaller diameter and is more porous, leading to a quicker and often more dramatic response to chemical treatments. Medium hair offers a balance between these two extremes but generally is not as resistant as coarse hair. Sparse hair lacks density but doesn’t fit into the context of resilience in chemical processes. Understanding these characteristics is crucial in cosmetology for effective hair treatment and management.