CIA Releases WW1 documents, German Invisible Ink recipe included

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CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by bl4nk » Wed Apr 20, 2011 2:56 pm

http://www.foia.cia.gov/ wrote:The Central Intelligence Agency today declassified the United States Government's six oldest classified documents, dating from 1917 and 1918. These documents, which describe secret writing techniques and are housed at the National Archives, are believed to be the only remaining classified documents from the World War I era. Documents describing secret writing fall under the CIA's purview to declassify.
Released Documents: [1] [2] [3] [4] [5] [6] [Combined]

How to make German Invisible Ink:
http://www.abovetopsecret.com/forum/thread691677/pg1 wrote:“Mix 5 drams copper acetol arsenate. 3 ounces acetone and add 1 pint amyl alcohol (fusil-oil). Heat in water bath — steam rising will dissolve the sealing material of its mucilage, wax or oil.” But there’s a warning for the intrepid spy: “Do not inhale fumes.”
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by joe » Wed Apr 20, 2011 3:17 pm

urine works also
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by King_Fluffy » Wed Apr 20, 2011 4:48 pm

Or those invisible markers :P
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by Nightwolf » Wed Apr 20, 2011 4:49 pm

Saw this on Rachel Madow show... was pretty cool.
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by Django » Wed Apr 20, 2011 6:11 pm

The Philosopher's Legacy!?
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by brassline » Mon May 30, 2011 10:01 pm

I will have to try the invisible ink.
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by mR.MouseR » Mon May 30, 2011 10:36 pm

Talk about OOOOOOLD news.
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by Erickarkos » Tue May 31, 2011 7:47 pm

joe wrote:urine works also
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Re: CIA Releases WW1 documents, German Invisible Ink recipe incl

Post by brassline » Tue May 31, 2011 8:32 pm

I was thinking of that erick when joe said urine also worked.
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