Frame conservation is the preservation of picture frames. This involves replicating missing decorative elements, cleaning, gilding, and toning frame surfaces.
Gilding
Gilding, in the context of frame preservation, describes the process by which metal leaf is applied to a frame to restore areas of the preexisting leaf, that have damage. Saturday, May 30, 2020
Toning
References
External links Videos of the frame conservation process from the Smithsonian Institution The Art of Display: Framed Photo Tips