Drypoint is a medium that is widely used by many artists. It produces an intaglio plate but uses no acid, hence the term Drypoint. A line is simply scratched into a plate with a sharp point. The scratching doesn't remove the metal but creates an edge to the line, a burr. This edge to the line will actually carry the ink and print with a tonal quality. It is often used in conjunction with etching where a small amont of tone is required eg. hair.