| 摘要 |
<p>PURPOSE:To obtain the subject composition having excellent water resistance on paper and stability with time by dissolving a specific anionic dye in water, adding a specific water resistance-imparting agent, an oil-soluble dye and a dispersive dye and mixing the resultant system with stirring at above room temperature. CONSTITUTION:(A) An anionic dye having <=60dyn/cm surface tension at 20 deg.C (in water) in the concentration of 0.1wt.% is added to water and completely dissolved, and (B) a water resistance-imparting agent containing a compound, hardly soluble in water and having aromatic ring or 6-12C aliphatic hydrocarbon as a lipophilic group and a group having O, N and S atoms as a hydrophilic group as an active ingredient, (C) an oil-soluble dye hardly soluble in water and having 2wt.% solubility at 20 deg.C when dissolving in ethyl alcohol and/or (D) a dispersing dye having same properties as the component C are added to said A solution, then the resultant mixture is stirred at above room temperature to afford the objective ink composition.</p> |
