Olivetti JP350S 300 300 cartridge http://www.olivettilexikon.com/customercare/jp.html us-ascii A laserjet The manual says it's a deskjet plus compatible, but selecting that in ghostscript doesn't work use laserjet instead There is a color cartridge available for this printer, but I don't have it so I don't know if it works. According to olivetti it's hp deskjet 500c compatible