Alaska Hairdresser and Barber Certification Practice Exam

The best way to test hair porosity is through performing a water test. This method is effective because it directly assesses how well the hair can absorb and hold moisture, which is the essence of porosity. When a strand of hair is placed in water, if it sinks quickly, this indicates high porosity, meaning the hair cuticles are raised or damaged and allowing water to enter easily. Conversely, if the hair floats, it suggests low porosity, as the cuticles are tightly closed, preventing moisture from penetrating.

Other options do not provide an accurate or reliable measure of porosity. Observing hair color doesn’t reveal anything about its porosity, as color is not directly linked to the hair’s ability to absorb moisture. Examining the ends of the hair may provide insight into damage or health status, but it won’t give a clear indication of overall porosity throughout the strand. Using a ruler to measure length has no relevance to porosity, as it only pertains to the physical length of the hair, not its structural properties regarding moisture absorption. Thus, the water test is the most accurate method for determining hair porosity.