There are various techniques used to emboss the design elements on the edge of a coin. One method involves using a machine called a straight edger during the hemming process, which both defines the effective diameter of the planchet and coins the edge. Another technique involves performing this operation simultaneously with the minting phase, where inscriptions and decorations are present in negative on the collar. The compression of the planchet against the walls of the collar transfers the design elements to the edge of the coin.