| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an emulsion ink for porous printing which can give a high printing density, does not suffer from offset, blotting, etc., and reduced in a change in viscosity upon a temperature change by stabilizing a W/O emulsion ink for porous printing containing carbon black as a water-insoluble colorant in the water phase. SOLUTION: This W/O emulsion ink for porous printing is prepared by using carbon block having a pH of 6-10 as the carbon block added to the water phase as a water-insoluble colorant. The concentration of the carbon block in the ink is desirably 1-30wt.%, and its particle diameter is desirably 10μm or below. It is desirable to add an O/W resin emulsion and/or a water-soluble resin to the water phase. It is possible to exclude the colorant component, a dispersant therefor and the resin as a binder from the oil phase.</p> |
