Patent ID: 7297203
Filing Date: 2007-11-20
Classification: C09B,C09D

Abstract:
1. An ink for use in an ink jet recording method in which an ink is ejected from a recording head through action of thermal energy, wherein the ink comprises a pigment represented by the general formula (1), a dispersant, a water-soluble organic compound and an aggregation inhibiting substance for inhibiting aggregation after dispersion breakdown of the pigment, wherein the content (mass %) of the water-soluble organic compound is 5.0 mass % or more to 16.5 mass % or less with respect to the total mass of the ink, wherein the content (mass %) of the aggregation inhibiting substance with respect to the total mass of the ink is 0.4 times or more to less than 1.3 times of the content (mass %) of the pigment with respect to the total mass of the ink; wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, a fluoroalkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a halogen atom, a nitro group, a sulfonic acid group or an alkaline earth metal salt thereof, an N-phenylaminosulfonyl group, a carboxyl group or an alkaline earth metal salt thereof, a carboamide group, an N-phenylcarbamoyl group, an a ureylene group, an iminodicarbonyl group or a carboxylate group.