Invisible inks could help foil counterfeiters of all kinds

Scientists have invented sophisticated fluorescent inks that one day could be used as multicolored barcodes for consumers to authenticate products often counterfeited. Snap a photo with your smartphone, and it will tell you if the item is real and worth your money. These inks, which can be printed using an inkjet printer, are invisible under normal light but visible under ultraviolet light. They give manufacturers and consumers an authentication tool that would be very difficult for counterfeiters to mimic.

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