Copper Crafts
A method of creating a relief design by hammering or pressing the reverse side of a metal surface. Literal meaning in French, "to push back".
Annealed (softened) sheet metal is supported by pitch, sand or sometimes supported by its edges and then worked with a variety of tools that depend on the type of metal and its thickness.
Repoussé is done in metals ranging from thin soft copper sheet that can be worked with wooden hand tools up to heavy steel plate worked hot with power tools and machines.