What is a key characteristic of gel nails?

Gel nails are specifically formulated products that require curing under UV or LED light as a fundamental aspect of their application. This curing process initiates a chemical reaction known as photopolymerization, which solidifies the gel and creates a durable and long-lasting finish. The use of UV or LED lamps is essential for achieving the desired consistency and longevity of the gel nails, allowing them to maintain a glossy appearance and resist chipping.

The alternative choices do not accurately reflect the nature of gel nails. For example, the indication that gel nails require no curing is inaccurate, as curing is a critical step. Similarly, the claim that gel nails dry by air exposure does not apply, since air drying does not harden gel products. While it is true that many gel products may feel sticky after application before they are cured, this is not a defining characteristic of gel nails as a whole, but rather a step in the application process. These details reinforce why curing with light is the hallmark feature of gel nails.