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Topic: Crook ink disappearing  (Read 940 times)

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Offline Kongasm

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Crook ink disappearing
« on: July 03, 2020, 09:32:12 AM »
Crook ink that disappears within seconds After making a Signature ? -transparent
How would it be possible ?
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Offline sjb

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Re: Crook ink disappearing
« Reply #1 on: July 03, 2020, 10:38:04 AM »
Typically something like oxidation or other changes. Have a look at for instance https://www.stevespanglerscience.com/lab/experiments/secret-lemon-juice-messages/ or similar
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