High-speed holographic images via inkjet printers
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We recently covered a 3D barcoding system that could protect a variety of items against counterfeiting. Researchers in Russia have now developed a method of rapidly printing the rainbow holograms used for counterfeit protection in credit cards and printed money. The team from ITMO University have developed a method for rapidly producing the holograms using standard inkjet printers. Holograms are printed onto specially developed micro-embossed paper using a colorless, highly refractive titanium dioxide ink. The printed paper is then glossed over with a transparent polymer, resulting in a rainbow hologram pattern where the ink is deposited. With current methods taking…
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