Chasing is the opposite technique to repoussé, and the two are used in conjunction to create a finished piece.
Whilst repoussé is used to work on the reverse of the metal to form a raised design on the front, chasing is used to refine the design on the front of the work by sinking the metal. The term chasing is derived from the noun "chase", which refers to a groove, furrow, channel or indentation. The adjectival form is "chased work".
See Also: Repousse