| 摘要 |
The present invention relates to a water dispersion for ink-jet printing including a colorant, metal oxide fine particles having an average particle size of 110 to 400 nm, and water-insoluble polymer particles, a weight ratio of the metal oxide fine particles to the colorant (metal oxide fine particles/colorant) being from 0.15 to 10; a water dispersion for ink-jet printing including metal oxide fine particles having an average particle size of 400 nm or smaller, and colorant-containing water-insoluble polymer particles; a water dispersion for ink-jet printing including plate-shaped metal oxide fine particles, and colorant-containing water-insoluble polymer particles; and a water-based ink for ink-jet printing including any of these water dispersions. According to the present invention, it is possible to achieve a high optical density of images upon printing the images with the water-based ink on a plain paper.
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