An HP printing technology that helps provide more vivid prints from digital photos. HP printers that use HP PhotoREt technology have two separate ink cartridges. One tricolor cartridge contains full dye-load inks in cyan, magenta, and yellow while the second ink cartridge contains light dye-load inks of light cyan and light magenta, as well as a specially formulated dye-based black ink. The black ink is richer and glossier than the usual black that is produced by a composite of colored inks. HP PhotoREt IV can produce a total of 289 levels of shade for each color. The complete palette exceeds 1.2 million colors.