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How copyright pens detect copyright Secrets

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Conversely, copyright bills, often printed on cheaper paper for instance Wooden pulp, absorb the ink quickly, resulting in a dark brown or black mark. This swift coloration modify serves as a powerful indicator of potential counterfeiting. Some products appear with built-in pens that may detect copyright bills by reacting in https://juliusdnxfn.59bloggers.com/39296655/the-best-side-of-hong-kong-dollar-100

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