Title:
INFORMATION DISPLAY MEDIUM MEMBER, INFORMATION DISPLAY MEDIUM, BOOKLET, LAMINATE, METHOD RELATED THERETO, METHOD FOR FORMING LATENT IMAGE CORRESPONDING TO PRINTED IMAGE ON LAMINATE, DEVICE THEREFOR, AND LAMINATE MANUFACTURED BY SAME
Document Type and Number:
WIPO Patent Application WO/2022/154087
Kind Code:
A1
Abstract:
The present invention addresses the problem of: providing an information display medium, a laminate, or the like having an advantage such as high security; and reliably forming a latent image on a laminate such that, although the latent image is not recognizable to a general camera or the naked eye, said image is visible when an infrared visualization device, such as an infrared camera, is employed. The present invention provides: an information display medium member or the like containing a cesium tungsten oxide or lanthanum hexaboride; a laminate or the like including a first-surface-side laser color-developing layer having an opening region, and a near-infrared absorption layer that is formed on a first surface side, that is positioned, at least in a portion thereof, in the opening region or that at least partially overlaps with the opening region, and that contains the cesium tungsten oxide or the lanthanum hexaboride; and a method or the like in which a target section is scanned while laser light is radiated and the resolution is set so that a latent image can be formed by reducing, in a near-infrared absorption layer, near-infrared absorption at least in a prescribed wavelength range without causing a base material layer to develop color in the visible light range.
Inventors:
MIN XIN (JP)
Application Number:
PCT/JP2022/001151
Publication Date:
July 21, 2022
Filing Date:
January 14, 2022
Export Citation:
Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
B32B9/00; B32B7/023; B41M3/14; B42D25/24; B42D25/328; B42D25/36; B42D25/382; B42D25/41; G02B5/22
Foreign References:
| JP3221579U | 2019-06-06 | |||
| JP2019155705A | 2019-09-19 | |||
| JP2019038255A | 2019-03-14 | |||
| JP2013240885A | 2013-12-05 |
Attorney, Agent or Firm:
TANAKA Shinichiro et al. (JP)
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