| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water-based marking pen ink for writing board giving a written mark free from cissing and shrinking phenomena even by using in combination with an oil-based marking pen on the same writing board. SOLUTION: This ink composition contains a colorant, a water-soluble resin, a releasing agent, a wetting agent and water as essential components. The wetting agent to improve the wettability of the ink to the surface of a writing board is composed of a combination of one or more kinds of compounds selected from polyether-modified silicone and fluorine-based surfactant with one or more kinds of compounds selected from among an acetylene glycol compound and its ethylene oxide adduct.</p> |
