Get precise image detail and excellent gloss uniformity with HP's patented, dye-based black ink formulation. The HP 84 Ink Cartridge makes consistent photo-quality printing easy and reliable for an excellent value in your Hewlett-Packard Designjet 10ps, 20ps, 50ps, 120 and 120nr. HP ink is designed to deliver an optimal balance of image quality and reliability. Managing supplies is easy with HP Smart printing technology. Cartridge is easy to use and install.