| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an authenticity determiner with a color varying function which shows a new color change, in consideration that the color change of color variable ink is not sufficient for authenticity confirmation of a security object now because the color change is inevitably "blue shift" and materials showing similar color changes can be easily obtained generally. <P>SOLUTION: A color variable ink layer containing a dye or the like which shifts a wavelength of reflected light from a visible region at a wavelength of≤500 nm to an ultraviolet region and a color variable ink layer containing a dye or the like which shifts it from an infrared region to a visible region at a wavelength of≤500 nm are laminated, and furthermore, a hologram forming layer is laminated, thereby the authenticity determiner with a color varying function shows so-called "red shift" and a unique "hologram" when being observed. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
