Conference Report - Photographic Encipher System

Document Type: 
Document Number (FOIA) /ESDN (CREST): 
Release Decision: 
Original Classification: 
Document Page Count: 
Document Creation Date: 
November 17, 2016
Document Release Date: 
March 10, 1998
Sequence Number: 
Case Number: 
Publication Date: 
March 26, 1959
Content Type: 
PDF icon CIA-RDP78-02820A000500020076-1.pdf322.63 KB
Approved For Release 2000/09/11: CIA-RDP78-0282OA000500020076-1 21 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 . c 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