What is the purpose of a shampoo service before coloring hair?

The purpose of a shampoo service before coloring hair is primarily to remove buildup and prepare the hair. When coloring hair, it is essential to start with a clean slate, as any dirt, oils, or styling products can interfere with the color application and the hair's ability to absorb the dye evenly. By thoroughly shampooing the hair, stylists ensure that the surface is free from any residue that could hinder the coloring process, allowing the hair to take the color more effectively.

While conditioning the hair, creating a pleasant aroma, and promoting scalp health are beneficial aspects of hair care, they do not directly serve the primary purpose of preparing the hair for color application. Conditioning, for instance, may add moisture but could also leave a residue that affects color absorption. Similarly, while a pleasant aroma is a nice feature of some shampoos, it does not contribute to the efficacy of the color treatment. Promoting scalp health is important for overall hair care but is not the immediate focus during the shampooing process before coloring.