COLOR REPRODUCTION SYSTEMS REVIEW

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002400040011-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 28, 2016
• Document Release Date: April 27, 2005
• Sequence Number: 11
• Publication Date: November 30, 1964
• Content Type: REPORT

Approved For Release 2005/0SKRLkTZDP78B0477tA002400040011-1
25X1
PAR 213
30 Nov 64
SUBJECT: Color Reproduction Systems Review
TASK/PROBLEM
1. In view of the recent importance attached to color photography
by the intelligence community, investigate and determine the most suitable
means to reproduce and utilize multiple copies of color materials, Deter-
mine the most suitable reproduction system and types of equipment to be
used in all phases of the reproduction cycle. Also, attempt to define how
color photography can best be utilized by the photo interpreter.
DISCUSSION
2. Duplication and reproduction system studies have been concentrated
in the enlarging and contact printing stages during the past quarter. In
the contact printing stage, two techniques were used:
a. White light printing (color compensating filters)
b. Tri-color printing (narrow bands of red, green and blue
filtered light)
The results of the evaluation of the two methods indicate that the tri-
color (or additive) printing renders improved resolution, higher color
saturation and slightly higher contrast with less inter layer effect or
layer contamination. When using the additive printing method for making a
black-and-white duplicate, certain colored objects did not record with
white light printing but did print when using narrow-band light. This
indicates that narrow-band printing should be used for contact printing
of both color and black-and-white films in the duplicating stage.
3. Tests to date indicate that duplication of a high altitude, high
contrast, acquisition material onto the same material will give excellent
results. High-altitude acquisition results in a low scene luminance range
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 Approved For 'Release 2005/SK DP78BO47 AO02400040011-1
PAR 213
30 Nov 64
and, therefore, the increase in contrast is acceptable. Further generations
of the image will result in extremely high contrast and loss of information
if duplicated to successive generations on Type S0-121 material. Therefore,
the conclusion reached is that duplication onto a high contrast, high
definition aerial original type material should not extend beyond the second
generation.
4. Efforts continued on the development of techniques to produce the
best methods for successive color enlargements. Of the six methods tried, the
best quality was obtained by a 5X direct positive enlargement from the original
onto Type S0-121. This enlargement gave the best definition. The best
quality obtained for tone was a direct 5X positive enlargement from the orig-
inal onto Color Duplicating Film, Type S0-271. The most practical sys-
tem for community usage appears to be use of contact print negative made
from the original acquisition positive, using a material such as 0 Color 25X1
Internegative Film. From this internegative, good quality enlargements for
both resolution and tone can be produced. It is readily apparent that an
internegative made from a high contrast data reduction copy will result in
loss of resolution and tone. Therefore, the maximum information is available
to the user through a data reduction copy plus a color internegative, both
produced directly from the original.
5. A progress review took place with customer representatives on 19 Novem-
ber 1964. All progress to date, including demonstration materials, was discussed.
It was emphasized that color reproduction systems must be considered as a
part of the entire acquisition system, which includes the original acquisition
as well as the subsequent duplicating stages. Techniques and materials
for both stages should be regarded as a unit rather than subdividing into
parts and treating each separately.
6. Design and content of briefing aids were discussed with customer
representatives. It was agreed that customer guidance was essential in or-
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 Approved Fo elease 2005/OS RIE DP78BO47 A002400040011-1
PAR 213
30 Nov '64
der to provide the most useful aids. It was further agreed that rough
drafts of all briefing aids to be developed would be supplied to the cus-
tomer for his approval prior to final art work.
7. Stereo viewing tests were conducted using material available from
the acquisitions obtained in August. Enlargements and contact prints were
used in stereo viewing combinations. The stereo image produced by color
and black-and-white pairs indicated the need for suppressing the black-
and-white brightness by the use of ND (neutral density) filters in the
viewing beam. On an average, most scenes viewed required approximately a
.7 to .9 ND in the black-and-white viewing beam to produce the visual
sensation of color saturation in the stereo image.
PLANNED ACTIVITIES
8. Prepare rough drafts of briefing aid designs and submit for
approval or further guidance by the customer.
9. Initiate preparation of the final report for PAR 213 as soon as
possible. Completion is anticipated by the scheduled date of February 28,
1965.
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