Cloisonné, an ancient metalworking technique, is a multi-step enamel process used to produce jewelry, vases, and other decorative items.
To produce cloisonné, patterns such as flowers or leaves are outlined with
thin copper or bronze wires glued or soldered to a metal base, forming
cells (cloisons) which are then filled in with thick, colored enamel pastes. The object is fired at a low temperature to harden the enamel, and the surface is then ground smooth with abrasives and polished. Finally, the wires and base are electroplated with gold. Cloisonné techniques became highly refined during the late nineteenth and twentieth centuries.