Intaglio is a printing method in which the elements to be printed are incised into the surface. The sunken areas, which hold the printing ink, are called cells. The non-printing elements are known as land areas. In this printing process, the ink is applied to the cylinder and the excess ink is removed with a doctor blade.
This leaves ink only in the cells, that is to say the sunken areas on the engraved cylinder, which then print. The pressure from the impression roller causes the ink to transfer onto the substrate. The amount of ink transferred depends on the respective depths of the engraved cells.