California Cosmetology Written ExamChemical Texture ServicesMedium
A cosmetologist is performing a permanent wave on a client with coarse, wiry hair texture. Compared to fine hair, how should the processing time typically be adjusted?
- ADecreased, because coarse hair has a thinner, more penetrable cuticle
- BIncreased only if the hair is also chemically colored
- CIncreased, because coarse hair has a larger diameter and more compact cuticle requiring longer penetration time
- DKept exactly the same regardless of hair texture
Show answer & explanationAnswer & explanation
Correct answer: C. Increased, because coarse hair has a larger diameter and more compact cuticle requiring longer penetration time
Coarse hair has a larger diameter and a thicker, more tightly packed cuticle layer, which slows the penetration of perm solution into the cortex. This typically requires a longer processing time compared to fine hair, which processes faster due to its thinner structure.
Why the other options are wrong
- A. Coarse hair actually has a thicker, more compact cuticle, not thinner.
- B. Texture alone justifies the adjustment; coloring is a separate porosity factor.
- D. Texture is a key factor that requires processing time adjustments.
Texture and Processing Time
Coarse hair has a larger diameter and denser cuticle, requiring longer perm processing time than fine hair, which processes more quickly.
- Coarse hair = larger diameter, more compact cuticle
- Fine hair = thinner diameter, processes faster
- Texture is assessed alongside porosity before service
Memory trick: 'Coarse takes Course (longer time) to soak in'