Now we’ve invented next-generation fluorescent inks that will present a formidable challenge to counterfeiters. Images printed from these new inks display colors that depend on a type of built ...

Real or counterfeit? Northwestern University scientists have invented sophisticated fluorescent inks that one day could be used as multicolored barcodes for consumers to authenticate products that ...

Invisible ink: A new process from Xerox allows commercial printers to print fluorescent words and numbers on documents using standard toner on ordinary white paper. The process, which leverages ...