Which technique is used for enameling a watch?

Cloisonné is the correct technique for enameling a watch because it involves creating compartments or "cloisons" using fine wires, which are then filled with colored enamel. This method allows for intricate designs and is commonly used in high-end watchmaking to embellish dials and cases with vibrant colors and detailed patterns. The enclosed areas hold the enamel securely in place when it is fired, leading to a lasting finish.

Champlevé, while also a form of enameling, differs in technique as it involves carving or engraving areas into the surface of the metal to create receptacles for the enamel. Although it is used in watchmaking, it is less common than cloisonné for decorative work on dials. Bead setting refers to a technique for setting gemstones, and skeletonization involves cutting away parts of the movement or case to create a visual representation of the watch's mechanics, which are unrelated to the enameling process.