What is the function of a base coat in nail application?

The base coat serves several important functions in nail application, and its primary purpose is to protect the natural nail. When applied before color polish, a base coat acts as a barrier between the nails and the pigments found in nail colors, which can otherwise stain the natural nail. This protective layer helps to maintain the health of the nail and prevents discoloration, especially with darker shades of polish.

Additionally, while other functions such as ensuring long-lasting wear are typically associated with the performance of a base coat, its fundamental role is to safeguard the nail. The protective qualities it offers are crucial for anyone who frequently uses nail color, as it helps keep the nails looking their best and minimizes damage from chemicals or prolonged exposure to polishes.