This high resolution black cartridge uses Lexmark's exclusive pigmented black ink. This ink coupled with an increased number of print head nozzles and swath size, enables consumers to consistently produce high quality prints at unprecedented print speeds. Print business quality text and graphic documents with high visual impact due to sharper black inks.This cartridge contains redundant nozzles, which help ensure consistent print quality. Nozzles are laid out in pairs, so if one becomes clogged or fails, the other continues to print.