Alaska Hairdresser and Barber Certification Practice Exam

The main purpose of a strand test in hair coloring is to determine how the hair will react to the dye. This test is performed by applying the color formulation to a small section of hair and observing the result. It provides valuable insights into the hair's reaction to the chosen dye, including its ability to absorb the color and the expected final shade. By conducting a strand test, hairdressers can also identify any potential allergic reactions or unwanted results before applying the color to the entire head.

Other options like measuring the hair's elasticity, checking for previous color treatments, or assessing porosity are important aspects of hair care and preparation but are not the primary focus of the strand test. While understanding these factors can inform choices made in a color treatment, the strand test specifically aims to gauge the direct reaction of the hair to the selected dye. This makes it a crucial step in ensuring successful coloring outcomes and client satisfaction.