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In this technique, which has its roots in the metalworking art of the Elamite civilization, one piece of metal is placed over another. The base may be made of steel, nickel silver, gold, silver, copper, or brass, and in some cases, it is created from a combination of several metals. The main form is partially shaped in advance, followed by the engraving stage on its surface.
After cutting the piece, the installation area is carefully marked, and within the designated boundary, a wall about one millimeter high is built to prevent the piece from slipping. The edges of the piece are trimmed from the top or bottom so that they fit sharply and precisely into place. During assembly, two opposite points are first locked together, and then the remaining edges are secured in their positions.
If necessary, when the edges are too short, they are extended from the back—just as seen in certain Achaemenid metal artifacts, such as decorative plates. Finally, the finishing stage is carried out to polish the surface and achieve complete harmony between the pieces.
