GERMAN SECRET INK. FORMULAS USED IN PREPARATION OF. SOURCE-N.G.

• Document Type: CREST
• Collection: Secret Writing
• Document Number (FOIA) /ESDN (CREST): CIA-RDP11X00001R000100010006-4
• Release Decision: RIFPUB
• Original Classification: U
• Document Page Count: 3
• Document Creation Date: November 3, 2016
• Document Release Date: August 1, 2011
• Sequence Number: 6
• Content Type: MISC

Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4
ation of. Source- B.G.
N. 433
German secret Ink. Formulas used in prepbr-
The following is a copy of the forma .as used preperatiofa of
German secret ink.
I Comprime de Pyramiden d 0, I r.
ou (or) d 2 1/2
ou(or) d2I/2gr.
Le tout dolt etre melange avea 400 cmo d'eau pure.
- - .. - - - - r, - -
Pour faire apparaitre l'snore invisible.
1st.
Alceol legerement oamphree
22 gr.
Eau distillee
50 gr.
Nitrate de potasso
0 gr. 50
Acide aoetique
27 gr.
Tetraohlorure de carbure
20 gr.
Doit etro Bien melange at Is faire appliquer d.eseus aToo.
du coton mouille.
9 -
2nd,
Acids aoetigue
100 gr.,
Alceol a 90
100 gr.
Eau distillee
50 gr.
Teinture de capsium
16 gr.
Chlorhydrade is quinine
0 gr. 50
Belt otre applique aprea is premier bain, de' la, me
maniere mais it taut attendre quo la premier solution
soit cornplet~ment eoche.
EXEMPT from
per E.O. 11652, Sec. 5(E)(2;
Name Agency
Date
Reason ,--__
June 14.
cONAOENTIAI.
REQRADE
Authorify__. hM 00
ey... ...... r HAPS, ^ate..Mn .C
Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4
 Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4
German `iaoret Ink. 'orraulas used in prepor-
e.tion of. Soaroe. B.G.
id. 433
Juno 14,
The following is a oopg of the formulas used preperation of
German secret ink.
I Comprime Is Pyramiden d 0 , 1
on (or) d 2 I/2 gr.
I Comprime on As poudre d'aspirine d 0 I gr*
on (or) d 2 1/2 gr,
Le tout dolt otre melange aveo 400 cris d'eau purr.
- r - - - - ? - -
Pour fairs appara,itre Tenure invisible.
1st.
Aloeol lagoroment oamphree 22 gr.
Eau diatillee 50 gr.,
litrate do potaoeo 0 gr. 60
cido aoetique .27 gr.
3atraohloruro de carbure 20 gr.
Doit etro bieid melange et le faire appliquer doesus arroo
du coton raouille.
2nd.
Aside aoetigue
100 gr.
.Aloeol a 90
100 gr.
Lau distillee
50 gx',0
f2ointure do capsium
15 gr.
Oblorhydrado le quinine
0 gr, 50
/
Dbit etre applique
apree le premier bain, do
raaniere ?m .is it fain attendre quo la premier
noit oompAtement aoohe.
la memo
eolution
Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4
 Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4
Translation from the French
Compressed P,maiden ...................................... d 0,1 gr.
or, d St. ST9
Compressed or Powdered asperine............... ............ d,0I1 gr,
or ........................................... d 2z gr.
All of this i is t be mixed with 400 oms. of pure water.
In order to cause the appearance of the invisible ink
Slightly camphorated llceol ......................... 2,2 gr.
Distilled water. .................................... 50 gr.
Nitrate of potash ....................o.............0.0 gr. 50
Acetic :lcid ......................................... 27 gr.
Chloride of oarooiiide............................... 20 gr.
Must be well mixed maid applied with wet cotton.
Acetic acid .........................................100 gr.
Alceol 0 90.. .....................0.................100 gr.
Distilled ?pater............ ......................... 50 gr.
Tincture of oa;,psium.... ............................. 15 gr.
Chlorb.ydrate of quinin_e .............................0 gr.50
. 1ist be applied after the first bath, in the same manner but one
has to wait until the first solution is completely dry.
Approved For Release 2011/08/03: CIA-RDP11X00001 R000100010006-4