| 摘要 |
<p>An aqueous ink composition having high water reistance and excellent age stability and resistance to drying-up comprises an aqueous vehicle which contains a polyamine having primary amino groups in the proportion of 3 - 20% of amino groups contained in the molecule; at least one stabilizing agent selected from urea, thiourea, ethylene urea, hydroxyethyl urea, hydroxypropyl urea, ethylene thiourea, diethyl thiourea, 2-pyrrolidone, polyvinyl pyrrolidone, sorbitol, dimethylsulfone and mixtures thereof, and water and an anionic dye having a solubility of 10% by weight or more in said aqueous vehicle.</p> |
