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Originally Posted by conor912
For those talking about testing the ink, does it test for how long the ink has been on the card (if that's even possible) or just the age of the ink itself? Like if the forger bought an antique pen with the original ink in it, wouldn't that pass an ink/age test all day long?
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There is a standard test to judge how long the ink has been on the paper. A particular quality of pen ink changes over time after it's been applied. No scientific test is perfect, but it is often used to identify writing that has been applied relatively recently.