NIC Cosmetology Written (Theory) ExamScientific ConceptsMedium
A cosmetologist is analyzing a client's hair and notices that it is very fine and lacks elasticity. This client is considering a chemical texture service. To determine the hair's ability to stretch and return to its original length, the cosmetologist should perform a test for which hair property?
- ATexture
- BElasticity
- CDensity
- DPorosity
Show answer & explanationAnswer & explanation
Correct answer: B. Elasticity
Elasticity is the hair's ability to stretch and return to its original length without breaking. This property is crucial to assess before chemical texture services to prevent damage.
Why the other options are wrong
- A. Texture refers to the diameter of individual hair strands (fine, medium, coarse), not its stretch-and-return capability.
- C. Density refers to the number of hair strands per square inch on the scalp, not individual strand flexibility.
- D. Porosity is the hair's ability to absorb moisture, not its stretch and return.
Hair Elasticity
The hair's ability to stretch and return to its original length without breaking, indicating its strength and health.
- Healthy hair can stretch about 50% when wet and 20% when dry.
- Low elasticity indicates damage or weakness, making hair prone to breakage.
- Crucial test before chemical services (perms, relaxers) to prevent over-processing.
Memory trick: Elasticity: 'E'xtends and 'E'nds back where it 'E'xisted.