The 903 BK should be used by anyone looking for better defined colours, especially blacks. This black cartridge gives the deepest blacks necessary to make the contrast between the paper and the ink as distinct as possible, so that every letter, line, and image is clear and separate from the rest. Every portion is distinguishable and separated from the rest by a clean line, making your paper look much better than it would have been with dull inks and faded black prints.
