Conference Report - Photographic Encipher System

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-02820A000500020076-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: November 17, 2016
• Document Release Date: March 10, 1998
• Sequence Number: 76
• Publication Date: March 26, 1959
• Content Type: REPORT

Approved For Release 2000/09/11: CIA-RDP78-0282OA000500020076-1
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25X1A9a
Approved For Release 2000/09/11: CIA-RDP78-0282OA000500020076-1
 Approved For Release 200 ' ET CIA-RDP78-02820A000500020076-1
the in-between shades is absolutely essential to the security of the
system. : eco jr, the process is effectively drys Light and pressure
being the only gmantities required for Image formation and fixation.
Thirdly, the pWr is stable. l zposure to room light or daylight before
use will not affect the quality of the finished copy. Fourth, definition
should be very good. The globules can be reduced in sine to particles
as saa11 as 1 micron in diameter.
4. One other Interesting characteristic of the NCR paper, which
spay permit a sandwich construction for production of the cipher copy,
is that the globules can be induced to release the dye by application
of heat as well as by pressure. This techni, which consists basic-
ally of melting the gelatin around the dye, has Only been investigated
to a limited extent. As a result, it is Impossible to draw final
conclusions as to the vat of this characteristic. If it is found
feasible to fix the zetachromeic dye by application of t, the tedmiqAw
share on the attached sheet could be used to form the cipher copy ?
5. The lid representatives did not have newl of the paper to
shay, but their description of the printer duality obtainable has pro-
moted considerable interest in the possibilities of using the paper
in the cipher system. It would appear advisable for the Interested
personnel to visit the fttiaenal Clash Register Compsay an soon as possible
to further investigate the potentialities of this paper.
Distribution:
Rbject File
th y Beport
R+D Lab
SYS
8P Chrono
OC-E/R+D-EP :brc (26 March 1959)
Approved For Release 2000/09/11: CIA-RDP78-02820A000500020076-1
 Approved For Release 2000/09/11: CIA-RDP78-0282OA000500020076-1
P i sor
see to t
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App ; d For Release 2000 AF?7-d11~"
A mamlir: . i rc ` ^1ijorJ : 858 ' "`
w% *ha y aAP'L.AINon bothi i~.
Of the NCR raper. ':!,* NC paper
arcs+,, be in the blue vonthtfan.
The assembled sandwich is exposed
Plain Text to yellow light from both aides,
turning some areas of NCR paper
NCR Paz.?: from blue to colorless.
Key Text
Plain Text The sandwich is then exposed to
infra-red light from both sides.
CR Paper _ Tice glabulee on those areas adjacent
to a black surface are melted,
Ley Text fixing,tho dye permanently,
Ths NCI paper is expo"*qft.i sin
to ult ra-Vimlet .ght turfing the
unfixed areas blue.
NCR Paper t ` ttF : -P