West Virginia Cosmetology Board Practice Exam

Porosity in terms of hair refers to the hair's ability to absorb moisture. It describes the condition of the hair cuticle and how well it can allow moisture and other substances to penetrate. High porosity hair has gaps or holes in the cuticle layer, making it more absorbent but also more susceptible to damage and frizz. On the other hand, low porosity hair has a tightly compacted cuticle that makes moisture absorption more difficult, often leading to a buildup of products on the hair. Understanding porosity is crucial for choosing the right hair care products and treatments that will effectively nourish and maintain the health of the hair.

The other options relate to different aspects of hair. The color of the hair pertains to its pigmentation, strength references the hair's resilience against breakage and damage, and style refers to the way hair is arranged or fashioned. None of these concepts pertain to the hair’s ability to absorb moisture, which is the essence of porosity.