Ink composition, recording method using the same, and recorded matter
AssigneeSeiko Epson Corporation
InventorsDaisuke Ishihara, Miharu Kanaya, Chie Maruyama, Masaru Kumagai
Life of this patent
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Abstract
An ink composition includes at least a pigment, a humectant, and water in from 10 to 60% by weight to the total amount of ink. The humectant is a mixture of (A) at least one compound selected from glycerin, 1,2,6-hexanetriol, diethylene glycol, triethylene glycol, tetraethylene glycol, and dipropylene glycol; (B) either trimethylol propane or trimethylol ethane, or a mixture thereof; and (C) at least one compound selected from betaines, saccharides, and ureas and having a molecular weight in the range of from 100 to 200, at a content weight ratio of (A):(B):(C) of 1.0:0.1 to 1.0:1.0 to 3.5.
Claims8
An ink composition comprising at least a pigment, a water-soluble organic solvent, a humectant, and water in an amount from 10 to 60% by weight to of the total amount of the ink composition, wherein the water-soluble organic solvent is 1,2-alkanediol and/or glycol ether, and wherein the humectant is a mixture of the following compounds (A), (B), and (C):
- (A) at least one compound selected from glycerin, 1,2,6-hexanetriol, diethylene glycol, triethylene glycol, tetraethylene glycol, and dipropylene glycol,
- (B) either trimethylol propane or trimethylol ethane, or a mixture thereof, and
- (C) at least one compound selected from the group consisting of betaines, saccharides, and ureas and having a molecular weight in the range of from 100 to 200,
- at a content weight ratio of (A):(B):(C) of 1.0:0.1 to 1.0:1.0 to 3.5.
Dependencies are inferred from the claim text.