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Title:
LATENT IMAGE RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2002254546
Kind Code:
A
Abstract:

To provide a latent image recording medium such as a lottery ticket, passbooks, a show ticket, a membership certificate, a passport, a picture book, a game, a cash card, a telephone card or an IC card, of such a construction that a latent image in a latent image forming structural layer can be visually determined when viewed through a dedicated verifying medium, contrary to a normal state that an image such as a hologram image or a diffraction grating image played back through the mutual interference of a reflected and a diffracted light is only viewed.

At least the latent image forming structural layer and a diffraction forming structural layer with light transmission properties are laminated in that order on a base material. Further, the latent image forming structural layer is at least a reflective layer and a polymer material layer showing thermotropic properties.


Inventors:
OTA HARUMI
GOCHO SATOSHI
Application Number:
JP2001054913A
Publication Date:
September 11, 2002
Filing Date:
February 28, 2001
Export Citation:
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Assignee:
TOPPAN PRINTING CO LTD
International Classes:
B42D15/10; B32B7/02; G02B5/18; G02B5/30; G03H1/18; G06K19/06; G06K19/077; (IPC1-7): B32B7/02; B42D15/10; G02B5/18; G02B5/30; G03H1/18; G06K19/06; G06K19/077