What is the name of the typical processing technique for Sardinian jewelry?

The typical processing technique for Sardinian jewelry is called "filigree," which dates back to the third millennium BC. It involves intertwining two metal wires, usually made of silver or gold, which are twisted and flattened. The twisting occurs mechanically, with the two wires intertwining as they twist around a wooden spindle that rotates at an appropriate speed. The wires are passed through rollers, which allows them to stretch and achieve an increasingly smaller diameter. The flattening phase is carried out with a wire-flattening mill.

Next is the "scafatura" phase: the filigree is wound upon itself, and once several elements are obtained, they are immersed in the scafatura until cooled, after which they proceed to welding. The objects obtained from welding have a color similar to dirty silver, so they need to be whitened, which is achieved through annealing and subsequent immersion in a sulfuric acid solution. This process is repeated until the final effect is achieved. Once the object becomes silver, it can undergo another treatment if a gold plating effect is desired.

There are also alternative techniques for creating jewelry: lost wax casting. This processing technique, known for over 2,000 years, is still used today both for reproducing statues and monuments as well as in the world of jewelry. It is a technique passed down through millennia from generation to generation, without innovations, until it was also adopted by dentists for applying prosthetic methods.