Aqueous pigment dispersion, ink jet recording ink, and printed article

Abstract

There are provided an aqueous pigment dispersion containing a pigment, hydrophilic fumed silica, and an aqueous medium; an ink jet recording ink containing such an aqueous pigment dispersion; and a printed article using the aqueous pigment dispersion. The average particle size of the hydrophilic fumed silica is preferably not more than 250 nm. The amount of the hydrophilic fumed silica is preferably in the range of 20 to 300 mass % relative to the amount of the pigment. The amount of the pigment is preferably in the range of 0.5 to 30 mass % relative to the amount of the whole aqueous pigment dispersion.

1 . An aqueous pigment dispersion comprising a pigment, hydrophilic fumed silica, and an aqueous medium. 
     
     
         2 . The recording aqueous pigment dispersion according to  claim 1 , wherein the average particle size of the dispersed particles of the hydrophilic fumed silica is not more than 250 nm. 
     
     
         3 . The aqueous pigment dispersion according to  claim 1 , wherein the amount of the hydrophilic fumed silica is in the range of 20 to 300 mass % relative to the amount of the pigment. 
     
     
         4 . The aqueous pigment dispersion according to  claim 1 , wherein the amount of the pigment is in the range of 0.5 to 30 mass % relative to the amount of the whole aqueous pigment dispersion. 
     
     
         5 . An ink jet recording ink comprising the aqueous pigment dispersion according to  claim 1 . 
     
     
         6 . A printed article in which the aqueous pigment dispersion according to  claim 1  is used.