Which action is essential after providing services involving chemicals?

Washing hands thoroughly after providing services involving chemicals is essential for several important reasons. First, it ensures the removal of any residual chemicals that may have come into contact with the barber's skin during the service. This step is crucial for maintaining personal hygiene and preventing potential skin reactions or irritations that could occur if these chemicals linger on the skin.

Additionally, thorough handwashing helps to prevent cross-contamination. If a barber were to touch their face, tools, or other clients without washing their hands, they might inadvertently transfer harmful substances, leading to adverse effects, both for themselves and for others.

While using disinfectant on tools, closing equipment, and vacuuming the work area are important practices in a barber's routine, they do not specifically address the immediate health and safety of the barber after handling chemicals. Hence, washing hands represents the fundamental step in maintaining a safe and hygienic work environment.