Answer:
They are Intaglio printing processes when the ink is transferred to the support (paper, fabric, among others) through the grooved parts in the matrix.
Intaglio Printing types:
- Chalcogravure (direct and indirect): Chalcography is a word originated from the junction of two Greek terms: chalcos, meaning copper; and spelling, as we have seen, writing, carving, engraving. Metal plate engraving (copper, steel, zinc and aluminum).
- Rotogravure (paper money, postage stamps): Initially were engraved thin sheets of metal that fit into a cylinder, which integrated the rotary machine, transfers the ink on the holder.
- Other miscellaneous: photosensitive materials, acids, stone, metal,acrylic, among others.