Patent ID: 8262791

Claim:
Coloring particles comprising: a dye and a water-insoluble low-molecular-weight dispersant, wherein the average particle size of the coloring particles is 10 nm or more and 80 nm or less; the dispersant is selected from the group consisting of lauric acid, oleic acid, linoleic acid, toluic acid, cinnamic acid, and palmitic acid; the solubility parameter of the dye in water with a pH of 6.0 to 10.0 is 9.20 or more, the solubility parameter being represented by formula (1) below; and the content of the dye and the content of the water-insoluble low-molecular-weight dispersant satisfy a relationship of formula (2) below on a mass basis Solubility parameter=log(1/(aqueous solubility of dye <mol/L>)) Formula (1) 3/2≦(Content of dye in coloring particles)/(Content of water-insoluble low-molecular-weight dispersant in coloring particles). Formula (2)