HP DeskJet 3550 2400 1200 1 colour (CMY) cartridge or 1 black (K) cartridge http://h10010.www1.hp.com/wwpc/us/en/sm/WF05a/18972-236251-236261-14438-236261-305946.html B hpijs Does not understand PCL as most other DeskJets, it uses the so-called "Lightweight Imaging Device Interface Language" (LIDIL).<p>