What type of hair is typically classified as resistant?

Resistant hair is characterized by its course, thick texture and is often chemically untreated. This type of hair typically has a dense cuticle layer, which makes it less susceptible to chemical processes, such as those used in perms or relaxers. Because the cuticle is more compact and the hair shaft is sturdier, this hair type can be challenging to penetrate with formulations designed for chemical treatments.

In contrast, fine, straight hair lacks the density and resistance that comes with a coarser texture, making it more pliable and easier to manipulate with chemicals. Wavy hair that has been previously colored may have altered its structure and can be more susceptible to chemical treatments, while soft, curly hair that reacts easily tends to be more manageable and receptive to products. Hence, the classification of resistant hair accurately reflects the characteristics associated with coarseness and thickness found in untreated strands.