Digital printers use the four colour CMYK colour model. Using different amounts of these colours (cyan, magenta, yellow and black/key) subtracts the amount of white light that is reflected, creating the colours we see. Because RGB adds red, green and blue to create white this will not work with a digital printer. Conversions can be made on a computer, or sometimes on the printer itself.nnBecause they use the CMYK model, digital printers cannot print exact representations of Pantone colours. In this situation, litho printing would be used instead.