| 摘要 |
Ink jet ink which sufficiently suppresses curling phenomenon of printed matters and satisfies ejection stability, the ink comprising at least water, a colorant, a water-soluble organic compound 1 which is a water-retentive, water-soluble organic compound having a difference between the water retention ability in an environment of a temperature of 23°C and a humidity of 45% and the water retention ability in an environment of a temperature of 30°C and a humidity of 80% of 36% or less, and a water-soluble organic compound 2 which is a water-soluble organic compound other than the colorant and the water-soluble organic compound 1,
wherein the content X(%) of the water-soluble organic compound 1 is 10 mass% or more based on the total amount of the ink jet ink and the content X(%) of the water-soluble organic compound 1 and the content Y(%) of the water-soluble organic compound 2 based on the total amount of the ink jet ink satisfy the relation of the following formula (I) and formula (II): I €ƒ 0 < Y / X ‰¤ 0.9 , II €ƒX + Y ‰¥ 15 €ƒmass % . |
