The gilt glass technique goes back to antiquity. It consists in attaching a thin sheet of gold or silver under the glass. The design is executed in drypoint and held in place by a second layer or plate of glass.
This process was used in Bohemia under the name of “Zwischengoldglasser.”
In France, the dealer Jean-Baptiste Glomy (circa 1711-1786) made this process fashionable. He notably used this technique to frame his engraving by encircling them with a thin line of gold, subsequently giving his name to the procedure (“églomisé” in French).