Fitzpatrick, Cella, Harper & Scinto
Ink jet recording ink, ink jet image-forming method and ink jet recording apparatus
The invention provides an ink jet recording ink containing a self-dispersion pigment, to the surface of which an anionic functional group represented by the following general formula (I) has been bonded directly or through another atomic group, water, a water-soluble substance having a coefficient of hydrophilicity-hydrophobicity of 0.37 or more as defined by the following equation (A) and a water-soluble substance having a coefficient of hydrophilicity-hydrophobicity of 0.25 or less as defined by the equation (A), and having a surface tension of 34 mN/m or less.wherein M1 and M2 are, independently of each other, a hydrogen atom, alkali metal, ammonium or organic ammonium;Coefficient of hydrophilicity-hydrophobicity=[(Water activity value of a 20% aqueous solution)−(Molar fraction of water in the 20% aqueous solution)]/[1−(Molar fraction of water in the 20% aqueous solution)]  Equation (A)
Canon Kabushiki Kaisha
B C
B41M C09D
inventional inventional
Ryota Hitoshi Shoji
Kato Yoshino Koike