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A Secret
Letter with Invisible Ink
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Introduction:
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Developing recipes for invisible ink is the task
of scientists. Putting it to use is generally
the work of spies and others in pursuit of
nefarious deeds. It's the work of the sleuth to
figure it all out, at least that's the way most
good mystery novels work! But invisible ink has
also had its place in history.
Artifacts from World War II turn up quite
frequently, but a certain postcard turned up a
few years ago which caught everyone's interest.
The postcard had been sent out of Poland during
the occupation. There wasn't anything of
interest to the Germans on the postcard, or so
they thought.
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Invisible ink had made
this possible to send and receive secret messages for
many years, but what is invisible ink? And how does it
work?
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Material
and step by step instructions:
In this project you will research to find a simple
formula for invisible ink. You will also use different methods
for making and revealing invisible messages. Invisible ink is a
fun start to get familiar with chemistry and chemical changes. |
Details
of this project:
More details or support on this project is available for the
members of ScienceProject.com. Since research on this
subject has a long history, you might also be able to find good
books about it in your local library or find some information on
the internet. MiniScience.com also has a kit for invisible ink. |
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