The war on counterfeit products is fought using highly detailed printing, watermarks, and even holograms on packaging, but the latest weapon will also include your breath. Researchers at the University of Michigan and in South Korea have developed a thin film featuring invisible images and features only revealed when blasted with humid air, made using a sophisticated manufacturing process that's hard to duplicate.
via Gizmodo http://ift.tt/1nrtqiO http://ift.tt/1se8PCR
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