Noun: Intaglio
any printing process in which the design is etched or engraved into the matrix, such as Photogravure, Dry Point, Mezzotint, or Etching.
Etching is an intaglio printmaking process in which lines or areas are incised using a resist and acid to bite a metal plate to hold the ink. the plate (or Matrix) can be made of iron, copper, or zinc.
3 Recurring is set up for Copper Plate Etching.
https://www.metmuseum.org/about-the-met/collection-areas/drawings-and-prints/materials-and-techniques/printmaking/etching
