How is hair density defined?

Hair density refers to the number of individual hair strands within a specific area of the scalp, typically measured per square inch. This measurement is crucial for hairdressers and stylists, as it helps determine how to best style and treat an individual's hair.

Understanding hair density can impact various services, such as choosing the right cut, color application, or styling techniques. For instance, someone with high density may require different cutting techniques to reduce bulk compared to someone with low density, who may benefit from added volume through layering.

The thickness of each hair strand (the second option) does not relate to density; it instead relates to the individual strand's fineness or coarseness. Overall weight and length of hair strands are also irrelevant when discussing how densely hair is packed on the scalp. Therefore, the definition of hair density as the number of strands per square inch is critical in the hair design profession.