Cosmetology Practice Test – Pass the Massachusetts State Board Exam (2026 Guide)

The function of a strand test is to determine how the hair will react to a chemical treatment. This is a crucial step in the cosmetology process, especially when applying coloring or chemical relaxing products. By performing a strand test, professionals can assess the hair's response to the chemicals, which helps predict the final outcome and ensures that the treatment is suitable for the client's specific hair type and condition.

This test enables the stylist to make informed decisions about timing and application techniques to achieve optimal results. It also helps to avoid potential damage by identifying any adverse reactions or sensitivities prior to treating the entire head of hair.