Only one tricolor and one black HP C4340 ink cartridge are needed with this inkjet unit. Using black printer ink, the C4340 can produce resolutions of up to 1200x1200 dpi, and using color ink, a high quality resolution of 4800x1200 dpi can be produced. These color and black Photosmart C44340 ink cartridges yield 170 pages and 200 pages, respectively. Though these aren't very high page yields, high capacity versions of the HP C4340 ink are available for about twice the cost of the normal capacity. The standard Canon CLI-221BK ink has a higher capacity and lower cost.