The Canon PFI-300 Chroma Optimizer Ink Tank is a specially formulated LUCIA PRO ink, designed to be used with the Canon imagePROGRAF PRO-300 printer. The ink produces professional quality photos with an expanded color gamut and enhanced black density. Chroma Optimizer reduces the difference in ink droplet height to form a flat, smooth ink layer. This leads to an evenly reflected light, deep blacks, and bright, saturated colors on coated papers.