Epson engineered the T157820 157 Matte Black Ink Cartridge for the Epson R3000 Printer. With the demand for ink that could be used for fine art printing, Epson developed K3 technology to be of the highest photo quality knowing that the deepness of your shadows can set the mood of your image. Epson utilizes their UltraChrome K3 technology to produce deeper, richer tones as well as a water, scratch and fade-resistant print. In addition, K3 inks are characterized by consistency of color from print to print. You will be sure to get the exact degree of black that your picture requires.