Used to cover with a metallic deposit the surface of an object by using an electric current. This process allows to protect the object of the oxidation, but also to cover some material by a noble metal, for example.

A photographic print made on paper coated with gelatin impregnated with light-sensitive salts.

A style of architecture that emerged in Western Europe in the 12th century.

The gradine is a tool used for the cutting of the stone. It is a chisel very disentangled, provided from three to six teeth. It serves to rough-hew the stone facings farm such as the marble. It thus leaves in the stone tracks bound to its teeth:  small scratches.