Engraving is a printing technique where designs are cut into a flat surface using gravers or burins. The incised lines on the metal printing plate can then be used to produce prints by applying ink to the plate and pressing paper onto it. Common tools used in engraving include gravers, burnishers, acid, and mezzotint rockers, while plates were typically made of copper or wood and ink was made from oils like linseed, poppy, and walnut. Well-known engravers include William Blake, who produced illustrated books like Songs of Innocence using this intaglio printmaking method.