Zwischengoldglas
A double-walled glass with gold and silver leaf engraved and sealed between the walls.
The technique was known in antiquity and revived in Bohemia around 1730. The picture is protected between the walls and has survived for nearly 300 years. Examples are in the Victoria and Albert Museum and the Corning Museum of Glass.
Materials: Glass, gold and silver leaf, lacquer
Manufacture: Two cut glasses were fitted exactly into each other; gold leaf laid on the inner one was engraved with a needle before the two were joined.
The fine gold drawing – hunting scenes or saints – lying inside the glass.
The join at the rim where the two glasses meet, often visible as a thin line.