CLI 521BK - Ink tank - 1 x photo black Use Canon consumables and supplies with your Canon printer to give you crisp, sharp results, every time. Canon printers and have been designed and built to work together with their custom-designed consumables and supplies. This ensures that your text and graphic printing is clear and sharp, every time you print. Canon inks have been especially developed to work with our print heads and media. Correct formulation of ink is vital for long-term efficiency of your Canon machine. By matching the characteristics of Canon paper, the inks give consistently sharp text, vibrant colour graphics and stunning photo output.