Below is a list of Metal Engraving manufacturers from Philadelphia, Pennsylvania. Metal engraving is the process of creating a depression or incision onto the surface of a metal plate or object either for decorative purposes, sentimental reasons, to show ownership or for industrial purposes such as creating a printing plate. Metal engraving is achieved in a number of different processes, for example, by using specific tools such as burins, liners and etching tools, or by machines which use laser cutters, or through a process of acid etching or chemical milling.