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Plique-a-jour

plique·a·jour | ˌplēk-(ˌ)ä-ˈzhu̇r

noun

A form of cloisonne in which the enamel in the cells has no backing, producing a translucent effect

Plique-a-jour is a process of enameling that doesn’t utilize a backing for the enamel, creating a translucent effect that is highly effective in a number of settings. To ensure the enamel takes and is durable enough for the piece in which it is applied, it is created in cells, similar to the cloisonne approach to enamel. It was popular in the Art Nouveau period, with artists such as Rene Lalique using it to great effect to create things like insect wings, flowers, and other translucent objects in vases, bowls, pendants, and brooches. The technique dates back hundreds of years to the Byzantine Empire but was most popular in the early 20th century.