What are the 3 designs for counterfeit-proof features?
Counterfeit-proof features can be designed in 3 different ways:
- Open, i.e. can be recognised and therefore verified by anyone
Example: holograms, use of colour-shifting inks - Hidden, i.e. only verifiable by experts with applicable knowledge
Example: microscripts, guilloches - Forensic, i.e. can be used as evidence in court
Example: special individual markers
[GMP Compliance Adviser, Chapter 21.H]
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