NIC Cosmetology Written (Theory) ExamScientific ConceptsMedium
A cosmetologist is performing a hair analysis for a client who desires a chemical treatment. The cosmetologist notes that the client's hair feels rough, absorbs water quickly, and appears dull. What characteristic of the hair is the cosmetologist primarily assessing?
- AHair Texture
- BHair Elasticity
- CHair Density
- DHair Porosity
Show answer & explanationAnswer & explanation
Correct answer: D. Hair Porosity
Hair porosity refers to the hair's ability to absorb moisture. Hair that feels rough, absorbs water quickly, and appears dull indicates high porosity, meaning the cuticle is raised and allows for rapid absorption.
Why the other options are wrong
- A. Hair texture refers to the thickness or diameter of individual hair strands (fine, medium, coarse), not its absorption rate.
- B. Hair elasticity is the hair's ability to stretch and return to its original length, not related to water absorption speed.
- C. Hair density refers to the number of individual hair strands per square inch, not how it absorbs water.
Hair Porosity
The hair's ability to absorb moisture, determined by the condition of the cuticle layer. It affects how well products penetrate the hair shaft.
- Determined by the cuticle layer
- High porosity absorbs quickly, may feel rough
- Low porosity resists moisture absorption
Memory trick: Porosity Pours, Density Dots, Elasticity Extends, Texture Thickness.