HP 712 DesignJet ink cartridges are large-format plotters supplies engineered specifically for the HP DesignJet Studio, T210, T230, T250, T630, and T650 series. They use a dual-ink formula that combines pigment-based black ink (for water-resistant, archivable line drawings) with dye-based colour inks (for high-gamut 3D renders and maps).