A good example of this technique is an etch. The chromed printing plates can be placed on the roller-press. Intaglio printing Rolls bring the treacle ink on the plate. The whole plate will be covered with ink. A system of wipers removes the surplus ink from the plate.
Paper is transported between the printing-plate and the pressure roller.
This is processed under high pressure. The ink will only partly be absorbed by the paper. Small sections will reside on the paper and cause ridges. In most cases you can feel these ridges on a stamp with your fingertip. More colours Mostly intaglio-printing is used to print in one colour.