aquatint
OAB Definition
intaglio process, and the resulting print, in which a printing plate is dusted with resin particles, heated to harden the resin, and etched with acid to create a print with a range of tonal values, often combined with line work.
ABT Definition
Intaglio prints resembling watercolors. The printing plate is covered with a coating and etched with acid so as to create a range of tonal values, often combined with line work.