What is an example of a catalyst used in gel nail enhancements?

In the context of gel nail enhancements, ultraviolet light serves as a catalyst by initiating the curing process of the gel product. When the gel is applied to the nails, it remains in a soft, malleable state until it is exposed to UV light. The ultraviolet light triggers a photoinitiator within the gel, causing a chemical reaction that results in the polymerization of the gel substance. This process transforms the liquid gel into a hard, durable layer that adheres to the natural nail.

Understanding the role of UV light is crucial for achieving the desired results in gel nail applications. It ensures the gel sets properly, providing strength and longevity to the manicure. Other options, such as temperature, hydration, and pressure, do not play a direct role in the curing of gel products; therefore, they are not appropriate examples of catalysts in this specific application.