| 摘要 |
A water-based ink for ink-jet printing which contains a soluble vat dye; and a method of ink fixation which comprises printing a paper with the water-based ink by ink-jet printing and then irradiating the ink dots on the paper with a laser light to insolubilize the colorant and thereby fix the ink. By this method, an ink-jet print can be obtained which is free from ink dot blurring, has a bright color, and is comparable in durability (water resistance and light resistance) to conventional printed matters.
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