Cerography or glyphography is a printmaking technique related to engraving, using a layer of wax over a metal substrate. After the image is engraved into the wax, a positive plate is produced through stereotyping or electrotyping. This plate can be used with conventional letterpress equipment. The word is derived from the Greek Ancient Greek: κηρός, wax, and Ancient Greek: γράφειν, to write). The technique remained popular to the end of the 19th century but was gradually pushed out by photoengraving.