Anti-counterfeit hologram
A microstructure area providing a first diffractive visual effect is produced on the surface layer of a paper or cardboard substrate of a product. In addition, a bulge or a recess having a second microstructure area is produced on the surface layer, wherein a doubly curved portion is located between...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A microstructure area providing a first diffractive visual effect is produced on the surface layer of a paper or cardboard substrate of a product. In addition, a bulge or a recess having a second microstructure area is produced on the surface layer, wherein a doubly curved portion is located between the first and the second microstructure areas. Said combination of the bulge/recess, microstructure areas and doubly curved portion makes counterfeiting of the product difficult and provides a special visual effect. |
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