The HP DesignJet T210, T230, T250, T630 and T650, and the DesignJet Studio. It works with the HP 713 printhead. The older T120 and T520 use HP 711 instead, and the cartridges cannot be swapped between the two families.

Yes. Black, cyan, magenta and yellow are separate cartridges, so you only replace the colour that runs out. Black is the 80 ml size because it does most of the work on CAD line drawings; the colours are 29 ml.

Original HP cartridges are covered until the ink runs out or the warranty-end date printed on the cartridge, whichever comes first. HP's printer warranty does not cover damage or repairs caused by non-HP, refilled or expired cartridges, so genuine ink also protects the printhead and the plotter itself.

HP gives HP 712 cartridges an 18-month shelf life. Check the date on the box before you stock up, keep spares sealed in a cool, dry place, and use the oldest cartridges first. HP rates plain-paper prints made with HP 712 ink for up to 100 years of archive life.