| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ink set composed of a plurality of solid phase change inks. <P>SOLUTION: Not all but at least one of inks in the ink set includes an ink vehicle, a pigment, and a fluorescent agent and the rest inks include the ink vehicle and a pigment but a fluorescent agent. At least a first ink group and a second ink group in the ink set form a combination, the first ink group and the second ink group in the combination show substantially the same color in forming an image under surrounding light conditions. The first ink group and the second ink group in the combination contain different amounts of the fluorescent agent, and the fluorescent agent emits fluorescence by exposure to activation energy, generating a visible change in pattern colors formed in the image by the first ink group in comparison with those in the second ink group. <P>COPYRIGHT: (C)2010,JPO&INPIT |
