hp 90 ink cartridges work accurately - patented dye-based color inks and black pigment-based hp inks create accurate lines and images. reliable and easy-to-use hp printing supplies save you time and money and deliver outstanding value. hp 90 ink cartridges do the job flawlessly - print sharp lines and photo-quality images. patented hp dye-based inks and black pigment-based inks create accurate lines and images. hp 90 ink cartridges are reliable, easy and more productive for trouble-free, low-maintenance printing. hp smart printing technology ensures consistent print quality and provides automatic alerts for a low or empty cartridgee. hp 90 ink cartridges save time and money with less interruptions and more choices. hp 90 ink cartridges are now available in two sizes for each color - including the hp 90 black 775 ml ink cartridge, designed specifically for high volume printing. hardware compatibility: hp designjet 4000/4500 series printers