Texas Class A Barber Written ExamChemical ServicesHard
A client requests a hair coloring service, but during the consultation, the barber performs a patch test (predisposition test) and observes redness, swelling, and itching at the test site after 24 hours. What is the barber's professional responsibility in this situation?
- AApply a barrier cream to the scalp and proceed with the service.
- BSuggest a temporary hair color instead of permanent.
- CProceed with the service using a different brand of color.
- DRefuse the service and document the allergic reaction.
Show answer & explanationAnswer & explanation
Correct answer: D. Refuse the service and document the allergic reaction.
A positive patch test indicates an allergic reaction to the hair color ingredients, most commonly PPD. Performing the service would risk a severe allergic reaction, so the barber must refuse the service for the client's safety and document the incident.
Why the other options are wrong
- A. A barrier cream will not prevent a systemic allergic reaction, which can be severe and dangerous.
- B. While temporary color is an option for the client, the immediate professional responsibility regarding the permanent color service is refusal due to the allergic reaction.
- C. Switching brands doesn't guarantee safety, as many colors share common allergens; a positive patch test is a contraindication for the service type.
Patch Test (Predisposition Test)
A test performed 24-48 hours prior to a hair coloring service to determine if a client has an allergic reaction to the aniline derivatives (dyes) in the product.
- Required by manufacturers and often state boards
- Applied to a small, inconspicuous area of skin (e.g., behind ear, inner elbow)
- Positive reaction: redness, swelling, burning, itching, blisters
- Positive reaction means the service must be refused
Memory trick: PATCH test POSITIVE? REFUSE the color, or risk a disaster.