What is the purpose of performing a strand test?

The purpose of performing a strand test is to predict how the hair will react to the dye and to adjust timing. This test helps the stylist determine how the hair will actually take on the chosen color, revealing potential issues such as uneven coverage or unexpected results. It allows for adjustments in application techniques and timing based on the hair's texture, porosity, and previous treatments, ensuring a more precise and satisfactory outcome for the client. Through a strand test, stylists can see firsthand how the hair develops color, which is crucial for achieving the desired results and maintaining the hair's integrity.

The other choices do not fully encompass the primary goal of a strand test. While deciding on dye types and assessing the client's preferences can have their own significance in the overall coloring process, the strand test specifically focuses on predicting the hair's reaction and ensuring the color will be applied effectively.