What is the primary purpose of a strand test?

• A. To check scalp health
• B. To measure hair elasticity
• C. To determine whether color will fade
• D. To assess how hair will respond to a chemical service

Answer: (D)

The strand test is about predicting how hair will respond to a chemical service. By applying the product to a small section and processing it as you would the full service, you can see how the hair reacts—the processing time needed, the final color or texture, and whether there’s any damage or breakage. This helps you adjust techniques or decide to proceed at all to avoid surprises for the client. It isn’t primarily used to check scalp health, test elasticity, or determine fade after washing; those concerns aren’t what the strand test is designed to measure.