Which hair type is most likely to require less chemical processing?

Coarse hair generally has a thicker diameter and a more robust structure compared to other hair types. This resilience often means it can withstand chemical processes better than finer hair types and doesn't absorb chemicals as readily. As a result, coarse hair may require less frequent chemical processing, such as coloring or perming, because it can hold styles and treatments longer without suffering from damage.

In contrast, fine hair is more delicate and often lacks the same amount of cuticle layers. This makes it more prone to damage during chemical processes, often requiring more frequent treatments to achieve desired results. Medium hair sits between the two, but it still may require more care in processing compared to coarse hair. Porous hair, on the other hand, has a damaged cuticle layer and absorbs chemicals easily; thus, it often requires more processing to achieve stable results and can become easily over-processed. Hence, coarse hair is the type that aligns best with the need for less chemical processing.