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What Benjamin Franklin Learned While Fighting Counterfeiters

"In a study published Monday in the Proceedings of the National Academy of Sciences, a team of physicists has revealed new details about the composition of the ink and paper that Franklin used, raising questions about which of his innovations were intended as defenses against counterfeiting and which were simply experiments with new printing techniques."

Link to New York Times article (unlocked):

https://www.nytimes.com/2023/07/17/science/benjamin-franklin-counterfeit-currency.html?unlocked_article_code=AEF5QoLpOijZvUPtdXPy1rXB465mrD8GR2B9u35LX53skVzmi59spH70GmHHje6TgasFHEmrcNpskVdPI9U4qhsSS-FPDbTojgaJVioIQ_3aLLZ76pXMV_wGCtXitKYEoM9nnbqxME5jwa3R8hsAf3s_MS7v8YPi7aPJVQzSO1H61CV4TpCNZrsfgq8khaDodv-e3FoGUdxPntLtKOg0jeac81MyfaN3IEu5VSpAe_0WNa-PWHrHfAUA8ky_5-uVJt-HtKP8XPSXiyWRb9cblzsIsQpiLx8W8xFP0w5XyV4xNcGY2idQA55-yWcqQ_KYg8v463ASZJLj6aiJBygJtWQ2H3Zn-KK4Kf3BKJKY-40&smid=url-share