What is frit used for in enameling?

Frit is specifically a finely ground glass that is used in the enameling process. This powdered glass is crucial for creating the colorful, glass-like coatings applied to metal objects. When frit is heated, it melts and fuses to the metal surface, resulting in a durable and decorative finish.

The process of enameling allows for a range of aesthetic possibilities, as different types, colors, and textures of frit can be used to achieve various effects. This is fundamental to the art of enameling, as the frit is what provides the glossy, vibrant look characteristic of enamel work.

The other options, while related to metalwork and enameling, do not accurately define frit. A solid base is typically created with a suitable substrate, joining metal surfaces involves techniques like soldering or welding rather than frit, and metal alloys refer to combinations of metals, which are distinct from the glass medium used in enameling with frit.