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Invisible Ink, How can I make the combination visible again?
Invisible Ink, How can I make the combination visible again?
I received and very nice SAFE about a week ago.
I have the key but the combination to the lock was printed on a piece of standard paper with a black felt tip marker. The paper was in a plastic bag but the paper got wet and the ink with the combination vanished.
I can just barely see that there is something there if there is fluorescent light hitting the paper from both sides.
I figure I have one chance to retrieve the combination.
Any of you super chemist sleuths know how to bring back the writing?
The previous owner has moved and is not available.
2 Answers
- Anonymous1 decade agoFavorite Answer
2 ways - heat the paper or see it in ultraviolet rays
clear answer can be given if you tell the chemical name of the ink
Source(s): sd - Anonymous1 decade ago
heat or lemon juice