Dye-based ink. This formulation is specifically chosen to deliver an expanded color gamut, resulting in richer, more vibrant red tones and highly accurate, fade-resistant photo prints.
It offers a high page yield, often estimated at up to 3,800 4x6 inch photos per bottle  making it very cost-effective for photo enthusiasts.
It is specifically designed for Canon PIXMA MegaTank Photo Printers that use the 6-color GI-73 ink system, including models like the Canon PIXMA G570, G670, G550, G650, and G620.