Title:
複写牽制媒体及び真贋判定装置
Document Type and Number:
Japanese Patent JP7342560
Kind Code:
B2
Abstract:
To provide a copy restraint medium capable of further reliably suppressing forgery by copying, etc.SOLUTION: A copy restraint medium 1 comprises: a substrate 10; and an authenticity determination layer 20 laminated on at least one surface of the substrate 10, formed of at least two kinds of light emission particles 21A and 21B having different average particle diameters, which emit light by being irradiated with excitation light, and a transparent resin 22. At least the two kinds of light emission particles 21A and 21B have a difference in the average particle diameters of 10 μm or more, and are randomly mixed inside the authenticity determination layer 20 such that the particles contact one another.SELECTED DRAWING: Figure 2
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Inventors:
Shin Min
Application Number:
JP2019170840A
Publication Date:
September 12, 2023
Filing Date:
September 19, 2019
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
B42D25/387; B42D25/30; G07D7/12; G07D7/206
Domestic Patent References:
| JP2016514173A | ||||
| JP2004177684A | ||||
| JP10086563A |
Foreign References:
| US20130234043 |
Attorney, Agent or Firm:
Masayuki Shobayashi
Tetsuo Shiba
Kazuyoshi Hayashi
Tetsuo Shiba
Kazuyoshi Hayashi
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