| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an ink capable of being simply decolored, capable of being used for inspection, the prevention of forgery and the like, and useful for an ink jet printing method and the like by including a dye capable of being decolored by the irradiation of electron beams. SOLUTION: This ink contains an ink capable of being decolored by the irradiation of electron beams, such as an azo dye, an anthraquinone dye or a cyanine dye, concretely UV Red 101, UV Blue 18 or the like, in an amount of preferably 0.1-50 pts.wt., further preferably 0.5-30 pts.wt., per 100 pts.wt. of a conventional ink. A printed product printed with the ink is preferably decolored by the irradiation of electron beams by the use of a vacuum tube type electron beam irradiator using an acceleration voltage of <=100 kV.</p> |
