| 摘要 |
<p>The present invention relates to a water-based ink for ink-jet printing which is excellent in optical density when printed on plain papers, etc., and a water dispersion used in the water-based ink. The water dispersion for ink-jet printing according to the present invention includes a colorant, and secondary particles of a metal oxide which include a plurality of primary particles thereof connected to each other, wherein the metal oxide is at least one substance selected from the group consisting of silica, titanium oxide and cerium oxide, and the water-based ink for ink-jet printing according to the present invention contains the water dispersion.</p> |
