In what situation should a stylist perform a strand test?

Performing a strand test is essential when trying a new hair color or treatment on a client. This process involves applying the chosen color or product to a small section of hair to observe the results before proceeding with the entire application. The strand test helps assess how the hair will react to the dye or treatment, allowing the stylist to make informed decisions about timing, possible adjustments, and the suitability of the color or treatment for the client's hair type.

The strand test is particularly useful because it can reveal important information such as the final color outcome, potential for damage, and the client’s tolerance of the product. If different techniques or formulations are being used, the strand test acts as a safety measure to ensure client satisfaction and hair integrity.

In other contexts, such as after coloring the hair, before cutting, or when conducting a scalp analysis, this specific test is not appropriate nor necessary, as it is specifically designed for determining compatibility and effectiveness of new color or treatments.