» For other uses of etch or etching, see Etching (disambiguation), for the history of the method, see old master prints. Etching's the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio in the metal (the original process—in modern manufacturing other chemicals may be used on other types of material). As an intaglio method of printmaking it's, along with engraving, the most important technique for old master prints,… (More on Etcher)