The HP no. 78 tri-colour inkjet print cartridge (38 ml) guarantees an average of 970 pages featuring outstanding plain-paper image quality, photo-image quality on special media, exceptional lightfastness, and the best combination of speed and print quality in any print mode. The HP no. 78 tri-colour inkjet print cartridges also include a new printhead to automatically "tune up" the print quality with every cartridge replacement. Through a carefully crafted combination of ink chemistry, nozzle count, drop size, and firing frequency, the cartridge delivers unsurpassed HP print quality at top speed.