Enlarge / Khachatur Manukyan and colleagues at the University of Notre Dame used cutting-edge spectroscopic and imaging instruments to get a closer look at the inks, paper, and fibers that made Benjamin Franklin’s bills distinctive and hard to replicate.University of Notre Dame
A papermaker in Massachusetts named Zenas Marshall Crane is traditionally credited with being the first to include tiny fibers in the paper pulp used to print currency in 1844. But scientists at the University of Notre Dame have found evidence that Benjamin Franklin was incorporating colored fibers into his own printed currency much earlier, among other findings, according
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