| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water-base ink jet recording ink being excellent in water resistance and weathering resistance and having a good dispersion stability and stability of delivery through nozzles. SOLUTION: This fluid is prepared by dispersing carbon black subjected to absorption treatment with humic acid, its derivative or its salt in an aqueous liquid. The carbon black subjected to the treatment is one prepared by bringing carbon black into contact with a liquid prepared by dispersing or dissolving humic acid or its derivative in a water containing an alkali and allowing the surface of the carbon black to absorb humic acid or the salt.</p> |
