A technique for the decoration of metalwork by engraving on the outside of the raised surface. The metal is worked from the front by hammering with tools that raise, depress, or push aside the metal without removing any from the surface. Chasing is the opposite of embossing, or repoussé, in which the metal is worked from the back to give a higher relief. Strictly chasing refers to line decoration applied to the face of repoussé work with a tracer, but the term is frequently used more generally to describe any hammered or punched decoration on metal.