RE: Invisible Writing: A Favorite of Children and Spies Alike

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Invisible Writing: A Favorite of Children and Spies Alike

in deepdives •  6 years ago 

From being a manual to children's little science activity to tracing the entire history of such ink-usage, this post was so revealing and read-worthy in itself! Thanks mate.

deepdives
6 years ago by

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      ·  6 years ago 

    You're welcome. But I dont trace all.the history. It goes back to the American revolution and further.

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