Patent ID: 8523990
Filing Date: 2013-09-03
Classification: C09B,C09D,Y10T

Abstract:
1. An ink composition comprising: a compound represented by the following formula (1); an ingredient (C); and a moisture-retentive agent, wherein the content of compound represented by the formula (1) is from 0.1 mass % to lower than 7.0 mass %, the content of moisture-retentive agent having 3 or more hydroxyl groups is 10.0 mass % or lower, the molar ratio of the moisture-retentive agent having 3 or more hydroxyl groups to the compound represented by the formula (1) is lower than 30.0: wherein each of Ar each of A Y represents —OM or —NR M represents a hydrogen atom or a metal ion; and each of R wherein the ingredient (C) is at least one compound selected from the group consisting of compounds represented by the following formulae (2), (3), (4), (5) and (6): wherein each M in the formulae (2) to (5) represents a hydrogen atom or a metal ion; R in the formula (2) represents a hydrogen atom or a methyl group; and M′