A strand test provides insight into which two outcomes?

• A. How the hair will respond
• B. What was previously done on the hair
• C. Both A and B
• D. Neither

Answer: (C)

A strand test serves as a small preview of how the hair will react to the upcoming chemical service and also reveals any prior chemical work on the hair. By processing a tiny section, you can see how the hair lifts or deposits color, how the texture and elasticity hold up, and whether the result matches expectations. At the same time, the test can show signs of previous chemical treatments—such as unusually fast or slow processing, uneven results, or damage—that would affect timing, product strength, or whether the service is safe to proceed. This dual insight helps tailor the approach to the individual client, ensuring predictability and reducing the risk of overprocessing or damage.