California Cosmetology Written ExamChemical Texture ServicesEasy
A client with resistant, low-porosity hair arrives for a perm, while another client has damaged, overly porous hair. How should a cosmetologist adjust processing time between these two clients?
- APorosity only affects neutralization time, not processing time
- BProcess both clients for the same standard time regardless of porosity
- CIncrease processing time for the porous client and decrease it for the resistant client
- DIncrease processing time for the resistant client and decrease it for the porous client
Show answer & explanationAnswer & explanation
Correct answer: D. Increase processing time for the resistant client and decrease it for the porous client
Resistant, low-porosity hair has a tight, compact cuticle that resists penetration of the perm solution, requiring longer processing time; porous, damaged hair absorbs solution quickly and processes faster, so processing time must be shortened to avoid overprocessing.
Why the other options are wrong
- A. Porosity affects both processing and neutralizing considerations, not just neutralizing.
- B. Porosity directly affects absorption rate, so processing time must vary.
- C. This reverses the correct relationship between porosity and processing time.
Porosity and Processing Time
The hair's ability to absorb moisture/chemicals, determined by cuticle condition, directly affects how quickly perm solution penetrates and thus processing time.
- Resistant/low porosity = longer processing time
- Porous/damaged hair = shorter processing time
- Always perform a strand/test curl to confirm timing
Memory trick: Porous hair is a thirsty sponge—it soaks up chemicals fast, so pull it out sooner.