{HEAD ~ A non aqueous pigment ink} comprising a pigment, a non aqueous solvent, and non aqueous resin dispersion microparticles having a pigment dispersion capability, wherein the non aqueous resin dispersion microparticles are an acrylic polymer comprising an alkyl acrylate unit having an alkyl group of 12 or more carbon atoms and {TAIL ~ a acrylate unit} having a urethane group 
{ HEAD ~ A non aqueous pigment ink } comprising a pigment , a non aqueous solvent , and non aqueous resin dispersion microparticles having a pigment dispersion capability , wherein the non aqueous resin dispersion microparticles are an acrylic polymer comprising an alkyl acrylate unit having an alkyl group of 12 or more carbon atoms and { TAIL ~ a acrylate unit } having a urethane group
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