What is an example of a chemical service a barber might offer?

Hair coloring is an example of a chemical service that a barber might offer because it involves the application of products that contain chemicals to alter the natural pigment of the hair. This process typically uses dyes or bleaching agents to achieve the desired color and may require specific techniques and careful handling of the chemicals to ensure safety and effectiveness.

In contrast, hair cutting, shaving, and beard trimming are primarily mechanical services that do not involve chemical transformations of the hair. While these services are essential to a barber's skill set, they do not utilize chemical products as part of the service. Hair coloring, on the other hand, distinctly falls under the category of chemical services due to the interaction of the hair with the applied chemical formulations.