HP 731 DesignJet Printhead The HP 731 DesignJet Printhead and Original HP Bright Office Inks are designed and tested together to produce bright colour and bold image quality for technical prints on plain papers. Key features Colour(s) of print cartridges: Cyan, magenta, yellow, grey, photo black, matte black (2 colours per printhead) Ink drop: 6 pl Compatible ink types: Dye-based (cyan, magenta, yellow, grey, photo black); pigment-based (matte black) Compatible Printers: HP DesignJet T1700 44-in (W6B55A#B1K) What’s in the box Printhead