fused coating, i.e.semi-transparent or opaque vitreous, porcelain-like coating applied by fusion to metal, glass, or ceramic, having a glossy appearance after hardening; typically made from powdered fusible glasses and opaque colorants mixed with oil or water, then painted or sprayed on the object and fired up to 800C; used to protect a surface, to decorate objects in various colors and patterns, to form a surface for encaustic painting, and for other purposes; see Getty AAT for more specifics on types of glass and colorant
Alternate Names: fused coating
Getty ID: https://vocab.getty.edu/page/aat/300014910