This Light Gray ink cartridge is part of the Five Monochrome inks found in the new 12 LUCIA Pigment Ink System. These monochrome inks deliver enhanced, deep black density to raise your level of professional print quality when creating the dramatic expression of grayscale photography. The LUCIA five monochrome inks also work together to reduce the effect of bronzing. As a result, your printed photos will have expanded dynamic range, especially in the darker or shadow areas of the image.The new PGI-29 Color LUCIA Pigment Inks are approximately 155% larger than previous Canon LUCIA PGI-9 ink tanks, and almost 40% larger than the ink tanks used by select competitors. The larger individual ink tanks provide greater value as less time is required replacing inks. This way more time can be spent printing, resulting in a more productive and streamlined workflow.