When Canon designed the  superb Canon ImagePROGRAF Pro-1000 they knew they needed a quality chroma optimiser ink cartridge to accompany the 12 other colours they designated the machine, and the PFI-1000CO was the result. The 80ml pigment based chroma optimiser Lucia Pro ink within the Canon 0556C001 works to great effect, creating photos with incredible permanence, that are of on unbeatable quality too!Designed to offer professional printers and enthusiastic amateur photographers an estimated 680 photos, the Canon PFI-1000CO is great value too.PLEASE NOTE: Canon`s official estimated page yield for this ink cartridge is measured in 6x4 photos and NOT A4 pages.