He mixes drypoint, aquatint and soft-ground etching techniques with graphite pencil. Corinth explored every print technique except aquatint; he favored drypoint and lithography. Intaglio techniques include engraving, etching, and drypoint. On his return, he made prints of his work, mostly using aquatint and drypoint etching. Mezzotint is a printmaking process of the intaglio family, technically a drypoint method. Hermann-Paul worked in Ripolin enamel paint, watercolors, woodcuts, lithographs, drypoint engraving, oils, and ink. David Milne worked predominantly in oil paint, watercolour and drypoint printmaking. Etching and drypoint are labor-intensive processes and one of the early forms of printmaking. Munch also created four lithograph versions and one drypoint of "Jealousy". She is also known for her drypoint engravings. This burr gives drypoint prints a characteristically soft, and sometimes blurry, line quality. Using a drypoint tool she further developed the fine details and figures of the drawing. Drypoint wiping techniques vary slightly from other intaglio techniques. In drypoint, 10 or 20 may be the maximum number of top-quality impressions possible.