What is the term used to describe a solvent-based colored film applied to the nail plate?

The term that describes a solvent-based colored film applied to the nail plate is "polish." Nail polish is specifically formulated to provide color and shine to nails and is typically composed of a mixture of pigments, solvents, film-forming agents, and other additives. This formulation allows the polish to adhere to the nail surface, dry quickly, and create a durable layer of color that enhances the appearance of natural nails or can be used in conjunction with artificial nails.

In contrast, gel polish is a different type of product that requires curing under a UV or LED light to set, while a base coat is used as a foundation to protect the nail and enhance the adhesion of colored polish. A topcoat is applied over colored polish to add shine and prolong the wear of the manicure. Therefore, the definition of a "polish" aligns directly with the question regarding a solvent-based colored film applied to the nail plate.