What can be used to check or stop bleeding in a salon?

Using a liquid or powder astringent is the appropriate choice for checking or stopping bleeding in a salon setting. Astringents contain compounds that cause the tissues to contract, which can help to constrict blood vessels and reduce bleeding from minor cuts or nicks that may occur during nail services.

In contrast, while water is essential for many salon processes and can be used for cleaning, it does not have properties that aid in stopping bleeding. Alcohol swabs, though they have antiseptic properties, can irritate the tissue and are not specifically designed to stop bleeding. Similarly, hydrogen peroxide, while often used for cleaning wounds, can actually damage tissues and delay healing, making it less suitable for controlling bleeding in a salon context. Therefore, the use of astringents is the most effective and appropriate method among the given options for managing minor bleeding.