Texas Class A Barber Written ExamChemical ServicesEasy
A barber is performing a strand test for a chemical relaxer. What is the primary purpose of this test?
- ATo assess the hair's elasticity and porosity.
- BTo determine the client's skin sensitivity to the relaxer.
- CTo check for potential metallic salts in the hair.
- DTo see how quickly the hair relaxes and if the desired straightness is achieved.
Show answer & explanationAnswer & explanation
Correct answer: D. To see how quickly the hair relaxes and if the desired straightness is achieved.
The strand test for a chemical relaxer is performed to observe the hair's reaction to the product, specifically how quickly it straightens and if the desired degree of relaxation is achieved without damage. This helps determine accurate processing time.
Why the other options are wrong
- A. Elasticity and porosity are assessed during the initial hair analysis, not typically with a chemical strand test.
- B. A patch test (predisposition test) is used to determine skin sensitivity.
- C. A metallic salt test is a separate procedure, usually involving soaking a strand in a specific solution, not part of a relaxer strand test.
Chemical Relaxer Strand Test
A test performed during chemical relaxer application where a small section of hair is periodically checked to determine the processing time and desired degree of relaxation.
- Determines processing time.
- Checks for desired straightness.
- Prevents over-processing and damage.
- Performed during relaxer application.
Memory trick: Patch for skin, strand for hair, metallic for safety.