The HP 78 Tri-color Ink Cartridge delivers HP quality and unsurpassed reliability. A critical component of the printing system, the reliable, low-maintenance HP cartridge combines patented dye-based HP inks with sophisticated printhead technology. In independent tests of the HP 78 and leading remanufactured cartridge brands, the HP 78 was over 50 times more reliable, on average. The HP 78 Cartridge is critical to achieving consistent, professional results, making it an excellent value.