The specially formulated LUCIA PGI-29DGY Dark Gray Ink produces professional quality photo prints and superior longevity, perfect for displaying your printed works of art. A dedicated Gray Ink Tank means you can print truly professional black ad white photos. Canon's proprietary FINE (Full Photolithographic Inkjet Nozzle Engineering) technology delivers exceptional sharpness and detail. For the best printing results, always use genuine Canon ink and photo paper. Plus, Canon's individual ink system can help increase efficiency by reducing waste and saving you money since you'll only be replacing the color that runs out.