What is the primary purpose of a strand test?

The primary purpose of a strand test is to preview color results. Conducting a strand test allows a stylist to apply the color to a small section of hair to see how it reacts to the dye, ensuring the desired shade is achieved before applying the color to the entire head. This process is crucial for understanding how the hair will absorb the color, and it helps in predicting the final outcome. By testing on a strand, the stylist can also assess the reaction of the hair, which can vary depending on factors like existing color, hair porosity, and overall hair health.

The other options pertain to different aspects of hair analysis. Assessing hair density focuses on the number of hair strands on the scalp, checking for damage involves evaluating the condition of the hair, and determining hair type relates to texture and curl pattern. While these assessments are important in their own right, they do not directly address the significance of the strand test concerning coloring hair.