A printing system that makes it possible to produce printed matter without creating a plate, by direct processing of a digital file. There are three main types: electro-ink (such as HP Indigo), toner and ink-jet. Digital printing is a good solution for printing small print runs because it lowers the costs involved in traditional printing technologies (plates, start-up, waste, etc.). It is also used in print-on-demand systems and custom printing ( customisation).