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    • 8. 发明专利
    • Image forming member
    • JP4635170B2
    • 2011-02-23
    • JP2005180131
    • 2005-06-21
    • 独立行政法人 国立印刷局
    • 匡 森永英司 河村
    • B42D15/10
    • PROBLEM TO BE SOLVED: To relate with an image forming body, in which images are switched between a luminous image manifesting itself when being irradiated with first ultraviolet rays and a luminous image manifesting itself when being irradiated with second ultraviolet rays, the wavelength range of which is different from that of the first ultraviolet rays. SOLUTION: Under the condition that an illuminant having excitation characteristics of luminous strength at different wavelength ranges of ultraviolet ray region are remarkably different from each other is employed so as to print the luminous image manifesting itself in a visible light region when being irradiated with the first ultraviolet rays having a certain wavelength range and the luminous image manifesting itself in the visible light region when being irradiated with the second ultraviolet rays having the wavelength range different from that being had with the first ultraviolet rays under the constitution that a large difference is provided between the image areal percentage of the former luminous image and that of the latter luminous image and ultraviolet absorber is printed over on both the luminous images in order to switch a luminous image between the two luminous images by means of the ultraviolet rays having the first ultraviolet rays and those having the second ultraviolet rays. COPYRIGHT: (C)2007,JPO&INPIT