The benefits of new pigment inks and an new ink set for large format printers (LFPs) were validated. The ink hues were optimized to provide efficient coverage of special colors used primarily in the printing industry. Targets for effective hues were set, and a combination of inks with well-balanced hues were verified for the best ink set. An ink set with orange and green, along with optimized CMY process colors, was found to be effective.