What is the main purpose of a base coat in nail applications?

The main purpose of a base coat in nail applications is to protect the nail. When applied before nail polish, the base coat acts as a barrier between the natural nail and the color polish, which can potentially stain or damage the nail. This protective layer helps to minimize moisture absorption and prevents the polish from adhering directly to the nail, which can lead to discoloration or brittleness. Additionally, a base coat can also help in improving the adhesion of the polish, ensuring a smoother and longer-lasting finish by providing a suitable surface for the polish application. While it does contribute to longer wear time, the primary function is still focused on protection.