New anti-counterfeit technique packs two light-reactive images into one material (IMAGE)

American Chemical Society

New anti-counterfeit technique packs two light-reactive images into one material

Caption

A new dual-mode security film reveals one image when light reflects off a pattern stamped on its surface, and a second image when polarized light shines through it.

Credit

Adapted from Langmuir 2024, DOI: 10.1021/acs.langmuir.4c01297

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