What is the purpose of a preliminary strand test?

The purpose of a preliminary strand test is to assess how the hair responds to chemical applications. This process involves taking a small section of hair and applying the chemical product in question to see how the hair reacts in terms of texture, elasticity, and overall integrity. The results of this test provide valuable insights into how the entire head of hair might react, helping the stylist make informed decisions about application methods and time needed for the treatment to achieve the desired outcome while minimizing the risk of damage.

Conducting a preliminary strand test is critical, especially when working with different hair types, conditions, and previous chemical treatments, as it helps to predict the overall effectiveness of the procedure and tailor it to the individual's hair characteristics.