NIC Barber Written (Theory) ExamScientific ConceptsMedium
A barber is about to perform a chemical relaxing service on a client with very curly, resistant hair. To ensure even and effective processing, which of the following actions is most critical to perform before applying the relaxer?
- AApply a protein treatment to strengthen the hair.
- BShampoo the hair thoroughly with a clarifying shampoo.
- CApply a scalp protector after sectioning the hair.
- DConduct a strand test to determine processing time and results.
Show answer & explanationAnswer & explanation
Correct answer: D. Conduct a strand test to determine processing time and results.
A strand test is crucial for chemical services, especially relaxers, as it allows the barber to assess the hair's elasticity, porosity, and how it reacts to the chemical, thereby determining the correct processing time and ensuring desired results without over-processing or damage.
Why the other options are wrong
- A. Protein treatments are beneficial but not the most critical *pre-application* step for determining processing time.
- B. Shampooing before a relaxer is often avoided or done gently, as it can sensitize the scalp; a clarifying shampoo is usually too harsh.
- C. Applying a scalp protector is important, but determining the processing time via a strand test is more critical for the actual chemical outcome and safety.
Chemical Service Strand Test
A preliminary test performed on a small section of hair to determine how it will react to a chemical service.
- Determines optimal processing time.
- Assesses hair elasticity and porosity.
- Prevents over-processing and damage.
- Mandatory for relaxers, perms, and color.
Memory trick: Pre-Chem Prep: Protect, Test, Apply.