Red Seal Cosmetology Practice Exam

What is the purpose of a strand test?

1. Determine client's hair thickness

2. Identify possible haircut styles

3. Determine hair's reaction to color formula

4. Check hair length

The correct answer is: Determine hair's reaction to color formula

A strand test is usually performed before applying hair color to the entire head, so that the hairstylist can determine how the client's hair will react to the color formula. This allows the stylist to make any necessary adjustments, such as increasing or decreasing the processing time or altering the formulation, to achieve the desired result. Option A is incorrect because a strand test does not determine the thickness of the hair, which can vary throughout the head. Option B is incorrect because a strand test does not identify possible haircut styles, as the haircut is usually chosen before the hair is colored. Option D is incorrect because a strand test does not check hair length, as the length does not affect the hair's reaction to the color formula. Therefore, option C is the correct answer as it explains the true purpose of a strand test.