From sharp lines to photo quality images hp 90 printing supplies get the job done right patented dye based colour and pigment based black hp inks produce accurate lines and images and hp smart technologyp1 ensures optimum print quality and reliability and provides automatic alerts when a cartridge is low or out with the new hp 90 black ink cartridge for high volume printing hp now offers two sizes of each colour fewer interruptions save time and increase productivity p1 using genu