Which method is used to apply gel polish?

Gel polish application relies on a specific process known as curing, which involves the use of UV or LED light. This curing process is essential because it transforms the liquid gel polish into a hard, durable finish that adheres effectively to the nail. When the gel polish is exposed to UV or LED light, it undergoes a photochemical reaction that causes it to harden and bond to the nail surface, providing a long-lasting manicure or pedicure.

The use of UV or LED light is what differentiates gel polish from traditional nail polish, which typically dries due to evaporation of solvents in the polish. The other options do not apply to gel polish; air drying or using a fan are methods appropriate for regular nail polish, and soaking in alcohol is not a technique used in gel polish application. Understanding the curing process is crucial for achieving the desired results when working with gel products.