Patent ID: 7909446

Claim:
A water dispersion for ink jet printing comprising a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), which colorant (B) comprises a pigment; and a water-insoluble organic compound (A) except for aliphatic acid derivatives which are aliphatic acid monoester compounds produced from a monovalent aliphatic acid in the form of a saturated or unsaturated alkylcarboxylic acid having 8 to 22 carbon atoms and a monovalent alcohol; aliphatic acid amide compounds produced from the above aliphatic acid and ammonia or a lower amine having 3 or less carbon atoms; or aliphatic acid anhydrides derived from the above aliphatic acid, wherein the solubility of water-insoluble organic compound (A) in water is 5 g or lower per 100 g of water as measured at 20° C., wherein a part of the water-insoluble organic compound (A) is contained in the particles of the vinyl polymer or the polyester-based polymer, and wherein a weight ratio of the water-insoluble organic compound (A) to the particles of the vinyl polymer or the polyester-based polymer in the water dispersion is from 1/100 to 5/1.