Ink composition, recording method using the same, and recorded matter

Abstract

The invention provides an ink composition which reduces viscosity difference caused by temperature as well as has excellent suitability for curl and crinkle, excellent ink penetration resistance, suitability for two-sides printing and color emissivity, and also a recording method using the same and a recorded matter are disclosed. The 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.

Description

technical field [0001] The present invention relates to an ink composition, a recording method and a recorded matter using the ink composition. More specifically, it relates to temperature-dependent viscosity characteristics of ink, wrinkling and curling characteristics, an ink composition excellent in fixability, an inkjet recording method, and a recorded matter. Background technique [0002] The inkjet recording method is a recording method in which ink droplets are ejected from an inkjet head, land on a recording medium such as paper, and print. Due to the innovative progress of inkjet recording technology in recent years, inkjet recording methods have also been used in high-definition image recording (printing) in the fields of photography and offset printing. [0003] The ink used in this inkjet recording method must have suitable ink physical property values ​​for ejection and control of fine ink droplets from the inkjet head, especially viscosity, and it is preferabl...

AI Technical Summary

Problems solved by technology

However, the problem with this method is that since the colorant in the ink also penetrates into the plain paper together with the ink, the printing quality is not high, and the ink bleeds significantly, and it is especially not suitable for double-sided printing.

Depending on the components contained in the ink, the viscosity of the ink tends to increase at low temperatures (for example, 10°C), whereas the viscosity tends to decrease at high temperatures (for example, 40°C).

[0009] If the viscosity increases or decreases rapidly due to temperature, the voltage signal to the inkjet head will increase excessively, and the handling will become complicated

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