Digital information from a computer can be used in various ways by the artist. Vector based illustration programmes create images as a series of lines and fills while pixel based painting programmes lay down colour and tone as miniature tiles. Both types now allow the user to make composite images on a number of layers.
Computer files are written to colour separation films by a high definition image setter which prints a series of fine dots shaped according to a specified, computer generated screening pattern. The image is then transferred to an etching plate or screen.
Alternatively prints can be made directly using high resolution ink jet printers capable of printing onto art papers or other suitable materials which will absorb the water soluble inks.