| 摘要 |
PURPOSE: An aqueous color pigment type black ink composition which has improved printability, black chromaticity, drying time, and, water resistance, and degree of being blurred is provided by using a specifically dispersed carbon black dispersing agent through applying polyvinyl alcohol as a dispersing agent and alkoxylate as a combination. CONSTITUTION: An aqueous color pigment type black ink composition produced by mixing black coloring agent, dispersing agent, combination dispersing agent, surfactant, permeating agent, chelating agent, pH controlling agent, alcohol, and deionized water is characterized by including: (a) a single dispersed solution of carbon black introducing sulfonate group or introducing carboxylate group as a black coloring agent, or combination thereof in an amount of 2-5wt%; (b) 0.005-10wt% of polyvinyl alcohol having a molecular weight of 1000-20000 hydrolyzed 60-80mol% from polyvinylacetate as a dispersing agent, and; (c) 0.01-10wt% of a combination dispersing agent selected from a group consisting aromatic ethoxylate, phosphorous containing alkoxylate. |
