The main differences between digital printing and traditional methods such as lithography, flexography, gravure , or letterpress are that no need to replace printing plates in digital whereas in analogue printing plates are continuously replaced, resulting in a quicker and less expensive turnaround time, and typically a loss of some fine-image detail by most commercial digital printing processes. The most popular methods include inkjet or laser printers that deposit pigment or toner onto a wide variety of substrates including paper, photo paper, canvas, glass, metal, marble and other substances.
In many of the processes the ink or toner does not permeate the substrate, as does conventional ink, but forms a thin layer on the surface that may be additionally adhered to the substrate by using a fuser fluid with heat process (toner) or UV curing  process (ink)