The four types of prints are intaglio, relief, planographic, and monoprint.
Intaglio prints are made by cutting into the matrix (printing plate), inking the
plate, and wiping it clean so that only the recesses hold ink. Veils of ink
intentionally left are referred to as plate tones. Relief prints are probably
the most common and made by cutting into the plate and avoiding the recesses
when inking.
http://wiki.answers.com/Q/What_are_the_types_of_printmaking
Intaglio prints are made by cutting into the matrix (printing plate), inking the
plate, and wiping it clean so that only the recesses hold ink. Veils of ink
intentionally left are referred to as plate tones. Relief prints are probably
the most common and made by cutting into the plate and avoiding the recesses
when inking.
http://wiki.answers.com/Q/What_are_the_types_of_printmaking