What is the purpose of powder alum in nail care?

The use of powder alum in nail care is primarily to stop minor bleeding. When a manicure or pedicure is performed, it is possible for the skin to be nicked or cut, leading to minor bleeding. Powder alum, which is an astringent, helps to constrict blood vessels and promote clotting, thereby effectively reducing or stopping the bleeding when applied to the affected area. This is particularly useful for professional nail technicians to ensure the comfort and safety of their clients during nail care procedures.

Other options do not directly relate to the primary function of powder alum. Polish application and color enhancement involve different products and techniques, while moisturizing typically requires lotions or oils, rather than astringent substances like alum.