| abstract |
PROBLEM TO BE SOLVED: To provide an aqueous ink composition capable of controlling wettability, surface tension and the like by a simple composition and further controlling antibacterial properties and the like. SOLUTION: The aqueous ink composition of the present invention contains a semipolar boron compound. Semi-polar boron compounds represented by diglycerin borate exhibit excellent wettability in a general environment, and by adding this, even with a simple composition, surface tension, wettability, dryness A water-based ink composition having a good balance is realized. The optimum range of the amount of the semipolar boron compound differs depending on whether the coloring agent contained in the aqueous ink composition is a dye or a pigment. 5% by weight to 3. When the coloring agent is a pigment, the amount is preferably 0.05% by weight to 10% by weight based on the total weight of the aqueous ink composition. |