| 摘要 |
Provided is an aqueous marking ink composition with which it is possible to write smoothly with low viscosity on non-absorbent surfaces, such as metals and resins, that are greased with oil, such as cutting oil and lubricating oil, while having suitable and favorable wettability and without being repelled; with which it is possible to draw lines having excellent masking characteristics and excellent adherence; in which the masking agent can be re-dispersed easily by a simple stirring operation even if the masking agent settles out over time; which has excellent masking characteristics and stability; and especially which can be stirred easily even with a stirring element having a low specific gravity. The disclosed aqueous marking ink composition contains at least: 1-20% by mass of a water-soluble resin having a hydrophobic moiety in a molecule thereof; a coloring agent containing at least 5-30% by mass of titanium oxide; 0.05-2% by mass of at least one compound selected from acetylenic glycols, acetylenic alcohols, and derivatives thereof; 1-20% by mass of a water-soluble solvent having a vapor pressure of at most 5 mmHg at 25°C; and water. |
