Kentucky Cosmetology State Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Question: 1 / 400

Define the term "porosity" in hair.

A measure of hair length

A measure of how well hair can absorb and retain moisture

Porosity in hair specifically refers to how well the hair can absorb and retain moisture. This characteristic is determined by the condition of the hair cuticle, the outer layer of the hair. When hair has high porosity, it means that the cuticles are either raised or damaged, allowing moisture to enter easily but also making it difficult to retain that moisture. Conversely, low porosity hair has tightly closed cuticles, which makes it harder for moisture to penetrate, yet it can retain moisture well once absorbed.

Understanding porosity is crucial for selecting appropriate hair care products and treatments. It directly influences how hair responds to coloring, chemical treatments, and conditioning, making it a vital concept for anyone working in cosmetology.

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A measure of hair density

A measure of damage to hair

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