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Search formSearch Query for FOIA ERR:
-AA+A
GERMAN SECRET INK. FORMULAS USED IN PREPERATION OF. SOURCE - N.G.
Document Type:
CREST
Collection:
Secret Writing
Document Number (FOIA) /ESDN (CREST):
CIA-RDP11X00001R000100010005-5
Release Decision:
RIFPUB
Original Classification:
C
Document Page Count:
1
Document Creation Date:
November 3, 2016
Document Release Date:
August 1, 2011
Sequence Number:
5
Case Number:
Publication Date:
July 12, 1954
Content Type:
MEMO
File:
Attachment Size
PDF icon CIA-RDP11X00001R000100010005-5.pdf 45.88 KB
Body:
Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010005-5 [See Paragraph 4. Instructions of October 31, 1 .. ~~ i Jrl 0. \ N1 J SUBJECT German Secret Ink. Formulas used=------------------------- S N G f ource- . . ation o . ----------------------------------------------- ! ------------ From ... -------- No. -433 -----------June I4, 8 ---- Date ------------------------------..---- 1918 Replying to O. N. 1. No- ---------------------- Date ---- ---------------- ------ --., 191 The following is a copy of the formulas used preperation of German secret ink. I Comprime de'Pyramiden d 0,I r ou (or) d 2 I/2 gr. I Comprime ou de poudre d'aspirine d 0 I gr. ou (or) d 2 1/2 gr. le tout doit etre melange avec 400 cros d'eau pure. Pour faire apparaitre l'encre invisible. Ist. Alceol legerernent camphree 22 gr. Eau distillee 50 gr. Nitrate de potasso 0 gr. 50 Acide acetique 27 gr. Tetrachlorure de carbure 20 gr. Doit titre Bien melange et le faire appliquer dessus avec du coton mouille. EXEMPT from autotnaac declagafffoaffoat per E.O. 11&62, Sec. 5(E)(2) t .J u t I am ?z~_T, I9 J .~ ~5 1918 2nd. Acide acetigue 100 gr. Alceol a 90 100 gr. Eau distillee 50 gr. Teinture de capsiun 15 gr. Chlorhydrade le quinine 0 gr. 50 Debit titre applique apre6 le premier bain, de la meme rnaniere mais it Taut attendre que la premier solution soit completment sobhe. ~?,~~ ~ -- .+v.ac7 .,w. 14 CUNFIDENT1L Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010005-5
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Search formSearch Query for FOIA ERR:
-AA+A
MISC RE HOW TO OPEN SEALED LETTERS
Document Type:
CREST
Collection:
Secret Writing
Document Number (FOIA) /ESDN (CREST):
CIA-RDP11X00001R000100010001-9
Release Decision:
RIFPUB
Original Classification:
C
Document Page Count:
6
Document Creation Date:
November 3, 2016
Document Release Date:
August 1, 2011
Sequence Number:
1
Case Number:
Content Type:
MISC
File:
Attachment Size
PDF icon CIA-RDP11X00001R000100010001-9.pdf 377.7 KB
Body:
EXEMPT from automatic declassification Approved For Release 2011/08/01 : CIA-RDP11X00001 R000100010001-9 tars' K 1 e ------~ ----- ./ Z?zo {( Reason 'w:i?.fr. .t c':t ta.r nt , 'w x??1+:14.1 rs,'Ifl r; yca () -0 -3 (). P:^bnto *v 1 ' J;-~-?~~~3 to dk. yil3t#t,.1i Gold SyJ )R +y~. loo .:w itt Vq'.`~if ~y ~#se :i'~+L d9',~wrh
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Search formSearch Query for FOIA ERR:
-AA+A
MEMORANDUM TO FRANK V. MARTENEK FROM AMHEINZELMANN RE SAMPLES MOST SUITED ON YOUR LIST
Document Type:
CREST
Collection:
Secret Writing
Document Number (FOIA) /ESDN (CREST):
CIA-RDP11X00001R000100010004-6
Release Decision:
RIFPUB
Original Classification:
C
Document Page Count:
1
Document Creation Date:
November 3, 2016
Document Release Date:
August 1, 2011
Sequence Number:
4
Case Number:
Content Type:
MEMO
File:
Attachment Size
PDF icon CIA-RDP11X00001R000100010004-6.pdf 45.84 KB
Body:
Approved For Release 2011/08/01: CIA-RDP11X00001 R000100010004-6 ADDRESS REPLY TO BUREAU OF STANDARDS DEPARTMENT OF COMMERCE BUREAU OF STANDARDS WASHINGTON Memorandum for Mr Frank V. Martenek, EXEMPT from automatic declcsaificc per E.O. 11652, Sec. 5(E)(2) Name Agency Dade Raaaca-/~----- e"78--9 on: October 30, 1917. Q91 I am transmitting seven samples which seerr to be the most suitable in the list which you submitted. They are as follows: --1-- Sulphuric acid (1-5) ......... 100 cc. Sugar 2 gin Water 90 cc. Cobalt Chloride 10 gm Glycerol 2 cc. Water 100 cc. Ammonium chloride ......... 15 gm Water .... ............. 100 co. Copper Nitrate 10 gm. Water .....J ............ 100 cc. Potassium bromide 3 gm Copper sulphate .......... 3 gm ~~ --6-- Water ....% ............ 100 cc. Nickel chloride .......... 2.5 gm Nickel nitrate ............ 2.5 gm 3 gm Cobalt chloride ........... 3 gm Water ................ 100 Co. Samples 1, 4, and 5 will doubtless exert a very corrosive action on steel pens, and therefore if suitable in other respects would have to be used with-a quill pen. If I observe any other samples which seem to possess any particular advantage, I will let you know, or if you will tell me just what characteristics you desire such to roduct to have, I will try to reproduce it, ek - e Respectfully, 16 Asst. Chemist. ;;a, puhoiry CONFIDENTIAL Approved For Release 2011/08/01: CIA-RDP11X00001 R000100010004-6
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