Jet printing ink and printing method using the ink

摘要

An ink which is usable with an ink jetting device for jetting the ink through a nozzle so as to effect printing on a recording medium. The ink contains a pigment as a coloring agent, and a non-aqueous solvent as an ink solvent. The pigment is in the form of particles having an average particle size of X mu m. The ink is jetted from the ink jetting device at a rate of Y, where Y is a volume of the ink which is ejected from the nozzle each time the ink jetting device is energized. The above-indicated X and Y satisfy the following formulas: $$ $ \mathop{\mathrm{image}}$$$