What is the definition of "density" in terms of hair?

The definition of "density" in the context of hair refers specifically to the number of hair strands per square inch on the scalp. This measure indicates how closely the hair strands are packed together, which can significantly influence the overall appearance and volume of a person's hair.

High density means that there are many strands of hair in a given area, resulting in a fuller look, while low density indicates fewer strands, leading to a more sparse appearance. Understanding hair density is crucial for hair stylists and cosmetologists because it affects hairstyle choices, techniques for cutting, coloring, and treating hair, as well as product selection for different hair types.

Other attributes of hair, such as the thickness of individual strands, the overall weight, or the elasticity, refer to different aspects of hair quality and characteristics but do not define density. Thus, the correct understanding of density focuses solely on the quantity of hair strands on the scalp.