FIELD: physics, printing industry.
SUBSTANCE: security feature comprises a flexible base layer; at least one side of this layer is covered by a metallic material layer with the sections where metal thickness amounts to 70% at most and 25% at least of the metallic material layer thickness at the adjacent sections; the security feature comprises also a layer of embossed holographic varnish.
EFFECT: increasing securities counterfeit protection.
19 cl, 5 dwg
Title |
Year |
Author |
Number |
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|
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|
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|
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|
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|
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- Gregor Graufogl'
|
RU2114742C1 |