Patent ID: 8795424
Filing Date: 2014-08-05
Classification: C09D

Abstract:
1. An ink for an ink-jet recording apparatus, comprising water, a pigment dispersion, a humectant, and a penetrating agent, wherein the humectant comprises glycerin, and 1,3-propanediol and/or 1,4-butanediol, a content of the glycerin is from 5% to 9% by mass in the ink, a total content of the 1,3-propanediol and/or 1,4-butanediol is from 30% to 45% by mass in the ink, the penetrating agent is a C1-C4 monoalkyl ether of polyhydric alcohol, and a content of the C1-C4 monoalkyl ether of polyhydric alcohol is from 2.0% to 4.5% by mass in the ink, wherein the C1-C4 monoalkyl ether of polyhyric comprises at least one selected from the group consisting of triethylene glycol monobutyl ether, triethylene gycol monometheyl ether, diethylene glycol monomethyl ether, diethylene glycol monoisopropyl ether, and diethylene glycol monoisobutyl ether.