Counterfeits, product piracy can be prevented by security features, such as printed 3-D microstructures

Security features are to protect bank notes, documents, and branded products against counterfeiting. Now researchers propose to use printed 3-D microstructures instead of 2-D structures, such as holograms, to improve counterfeit protection.

from Engineering and Construction News – ScienceDaily https://www.sciencedaily.com/releases/2017/11/171115104822.htm

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