Hp 81 dye ink cartridges are designed to work with hp 81 dye printheads as part of a complete modular ink system six specially formulated dye based ink colors deliver the smoothest color transitions and wide color gamuts these high capacity 680ml ink cartridges are ideal for overnight or unattended production printing built in smart chips constantly monitor ink cartridge levels and alert you when its time to replace compatible with hp designjet 5000 uv printing syste