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Thread: "The Mystery of a Medieval Blue Ink Has Been Solved"

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  1. November 10th, 2020, 10:15 AM #1
    FredRydr
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    Default "The Mystery of a Medieval Blue Ink Has Been Solved"

    The Mystery of a Medieval Blue Ink Has Been Solved

    Original source: https://advances.sciencemag.org/content/6/16/eaaz7772
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