Scholars who research "Dry point" look at printmaking technique of the intaglio family, in which an image is incised into a plate.
Hand-wiping techniques, Diamond-tipped needles, Carbide-tipped steel needles are a few categories of "Dry point".
Why study "Dry point"? understand easier to master than engraving for an artist trained in drawing because the technique of using the needle.
Pablo Picasso, Stanisław Masłowski, Mary Cassatt are a few specialists of "Dry point".