California Cosmetology Written ExamChemical Texture ServicesMedium
A cosmetologist applies perm solution and a single rod to a small test section of a new client's hair before wrapping the entire head, in order to predict processing time and anticipated curl result on that client's specific hair. This procedure is called a:
- APorosity strip test
- BPreliminary (pre-perm) strand test
- CPredisposition (patch) test
- DTest curl during processing
Show answer & explanationAnswer & explanation
Correct answer: B. Preliminary (pre-perm) strand test
A preliminary or pre-perm strand test is performed before the full service to determine how the client's hair will react to the chosen solution, predicting processing time and curl development, and is distinct from a patch test (allergy screening) or a test curl (checked mid-processing).
Why the other options are wrong
- A. There is no standard 'porosity strip test' terminology used this way.
- C. A predisposition/patch test checks for allergic skin reaction, not curl development.
- D. A test curl is checked during processing of the actual full service, not beforehand.
Preliminary (Pre-Perm) Strand Test
A test performed on a small section of hair before the full perm service to predict processing time and curl result.
- Performed before full application, unlike a test curl
- Different from a predisposition/patch test (allergy check)
- Helps prevent overprocessing or unsatisfactory curl
Memory trick: Test a snippet first so the whole head isn't a surprise.