Why is a base coat considered essential in nail application?

A base coat is regarded as essential in nail application primarily because it serves the purpose of preventing nail discoloration. When colored nail polish is applied directly onto the nail surface, lighter or natural nails can sometimes become stained from the pigments in the polish. By applying a base coat first, you create a protective barrier between the nail and the color polish, thereby minimizing the risk of discoloration that can occur from prolonged exposure to certain pigments.

In addition to its protective qualities, a base coat can also enhance the adhesion of the nail polish, leading to better overall wear and potentially extending the life of the manicure. However, the primary benefit discussed here focuses on its role in maintaining the natural appearance of the nails, making it an essential step in the nail application process.