Florida Cosmetology Licensing ExamChemical ServicesEasy
A cosmetologist is performing a chemical hair color service. Before application, the client states she has a history of allergic reactions to certain cosmetics. What is the mandatory safety precaution that must be performed 24-48 hours prior to the service?
- APorosity test
- BStrand test
- CElasticity test
- DPatch test (predisposition test)
Show answer & explanationAnswer & explanation
Correct answer: D. Patch test (predisposition test)
A patch test (predisposition test) is legally required 24-48 hours before any oxidative hair color service to check for allergic reactions, especially when a client has a history of allergies.
Why the other options are wrong
- A. A porosity test assesses the hair's ability to absorb moisture/chemicals, not allergic reactions.
- B. A strand test determines color result and processing time, not allergic reactions.
- C. An elasticity test assesses the hair's strength and ability to stretch, not allergic reactions.
Patch Test (Predisposition Test)
A test performed to determine if a client is allergic to hair color products prior to a chemical service.
- Mandatory 24-48 hours before oxidative hair color service
- Applied to a small area of skin (e.g., behind the ear or inner elbow)
- Checks for redness, swelling, burning, or itching
- Required by law and professional standards
Memory trick: Before you 'Patch' with color, ensure 'No Allergy' catch.