Patent ID: 8939567
Filing Date: 2015-01-27
Classification: B41J,C09D

Abstract:
1. An ink for an inkjet recording apparatus comprising at least water, a pigment, a high penetrating agent, a penetrating agent and a moisturizing agent, wherein the high penetrating agent is an alkyl-substituted 1,3-hexanediol or an alkyl-substituted 1,3-pentanediol each having 8 carbon atoms, the content of the high penetrating agent in the ink is 0.5 to 2.5% by mass, the penetrating agent is a diethylene glycol monomethyl ether or one or more member selected from the group consisting of diethylene glycol monohexyl ether, diethylene glycol mono-2-ethylhexyl ether and diethylene glycol dibutyl ether, the total amount of the contents of the high penetrating agent and penetrating agent in the ink is 2 to 5.5% by mass in the case when the penetrating agent is the diethylene glycol monomethyl ether, or 1.5 to 2.5% by mass in the case when the penetrating agent is the one or more member selected from the group consisting of diethylene glycol monohexyl ether, diethylene glycol mono-2-ethylhexyl ether and diethylene glycol dibutyl ether, the moisturizing agent is glycerin and 1,3-propanediol, and the content of the glycerin in the ink is 5% by mass or more, and the content of the 1,3-propanediol in the ink is 10 to 30% by mass.