l'Artisan Pastellier

L'Artisan Pastellier Encre Sympathique Invisible Ink

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$ 10.00
  • L'Artisan Pastellier Encre Sympathique Invisible Ink

l'Artisan Pastellier

L'Artisan Pastellier Encre Sympathique Invisible Ink

Write a review
| Ask a question
$ 10.00
$ 10.00

Need to write a super secret note? Use this Invisible Ink from L'Artisan Pastellier.

In the past, "friendly ink" was one of the techniques of espionage and spies. The invisible writing is revealed by simply heating it up. After a few hours, the humidity in the air rehydrates the ink and the letter disappears again.

The sympathetic ink contains cobalt chloride.
It is blue when it has lost its water molecules (heated) and transparent pink when it has 
taken them back. 
It is ink that should not be swallowed.