| 摘要 |
<p>PURPOSE:To provide an ink giving printed products having excellent fastness and high concentrations, having a fast anchoring property and stably jetted for long periods even the driving conditions are changed, by adding an acidic carbon black and a water-soluble resin having an acidic value of >= a specific value to an aqueous medium. CONSTITUTION:An acidic carbon black and a water-soluble resin having an acid value of 250 are added to an aqueous medium containing water, a polyhydric alcohol and/or an alkyl ester thereof and an aliphatic monohydric alcohol to provide the objective ink. The ink contains preferably the acidic carbon black containing a water-soluble resin having an acid value of >=250 and adsorbed to the surface of the carbon black. The amount of the water-soluble resin dissolved in the ink is preferably <=2wt.%.</p> |
