| abstract |
(57) [Summary] [Problem] To provide a forgery prevention label using a volume hologram, There is no problem in the manufacturing process itself, there is certainty in the process where the anti-counterfeiting effect occurs, and it is difficult to see the traces that have been processed for anti-counterfeiting, And a hologram label. The adhesive strength when a protective film (8) is adhered on a hologram (7) with a second adhesive (9) is partially changed, and when the protective film (8) is peeled off, a part of the second adhesive (9) remains on the hologram (7). You can see that it was peeled off. The same adhesive strength can be partially changed for the first adhesive 6. Further, the adhesive force of the first pressure-sensitive adhesive 6 was set to be larger than the 1% tensile strength of the hologram 7, and when the hologram 7 was to be peeled off, the hologram 7 was stretched and discolored. |