HP DeskJet 420C 600 300 Ink cartridges B/W:HP51626A/HP51626G Color:HP51625A http://www.hp.com/cposupport/eschome.html us-ascii B hpijs Color resolution is 300x300dpi (color was not tested).<p> Manual change between color and B/W cartdriges.<p> See also the HP DeskJet 400 entry for various driver options.<p> This printer seems to have a 600x300-dpi-REt grayscale mode which is probably not accessable with free software.<p>