| 摘要 |
<p>Disclosed is a water-based ink composition that can be highly stably stored under high-temperature standing conditions for a long period of time and, when used with an ink jet printer, can be highly stably ejected. This ink composition is characterized by comprising at least a coloring material dispersion comprising a colorant and a resin including the colorant, an acetylene glycol or its ether derivative, a C1 to C5 monohydric alcohol which has a solubility in water of not less than 0.5% by weight at 20°C, a humectant, and water, the resin being insoluble in water, the coloring material dispersion being dispersible in the ink composition, the alcohol and the humectant being in mutually soluble relationship with the acetylene glycol or its ether derivative.</p> |
