Patent ID: 8070871

Claim:
An ink jet ink comprising: a coloring material; and water-soluble organic solvents, wherein a content of the coloring material is less than 7.0 mass % based on a total mass of the ink, wherein the water-soluble organic solvents comprise (i) glycerin and (ii) a branched alkanediol having hydroxyl groups at both terminals of its main chain, wherein a content C of glycerin is 6.0 mass % or more and 12.0 mass % or less based on the total mass of the ink, wherein a content A of the branched alkanediol having hydroxyl groups at both terminals of its main chain is 4.0 mass % or more and 11.0 mass % or less based on the total mass of the ink, and wherein the content A of the branched alkanediol having hydroxyl groups at both terminals of its main chain and a total content B of the water-soluble organic solvents based on the total mass of the ink satisfy a relationship of 0.30â‰¦A/Bâ‰¦0.50.