COMPARISON OF MATERIALS

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A002000010028-2
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: November 8, 2012
• Sequence Number: 28
• Content Type: MISC

Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
112,
DESCRIPTOR
1. Fabrication Philosophy
2, Gain Function
3, Brightness Variation*
4, Diffuse Transmittance
5. Fraction of Energy in Viewing
Angle
6, Brightness
7. Specular Transmittance
8, Diffuse Reflectance*
(Ambient light sensitivity)
9. Resolution
10. Color Fidelity-
11. Maximum Size
12. Cost
*Viewing properties compromised in
choosing a rear projection screen.
COMPARISON 'es-Y MATERIALS
COnURCIAI: MATERIALS CGW MATERIALS
Empirical Based on Theoretical
Investigations
Medium to High Gain Low to High gain
90% greater than +60% Controllable
95% less than +15%
--On the average only half
the theoretical limit. 90%,of materials withi-1. 10%
Lowered by the addition of of theoretical limit,
absorbing iwtterial.
None Minor problems - Wavelength
dependent
Not optimum Near optimum
To 20 cycles/mm To 20 cycles/mm.
Good - Generally Good
No limit No limit ?
$2 - $30 per sq. ft.
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
01
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
Figure 2. Apparatus for Measurement Enclosure
of Diffuse Reflectance.
P.M. Tube?
i
H-
i
Pin Hole
Imaging
Lens
Circular
Fluorescent
Lamp
Sample
Non-Reflectino
Tube
Hemispherical
DLE:user
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
II)
10?4)A
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
TABLE -I
Comparison of the Theoretical and Measured Values of? T45
and Rd of Some Commercial
Commercial
Materials and
Rd
Materials
G(o)

Theo,
Mas.
6N2149
1.2
60%
46 %
LS6OG
3.8
.31
RAVEN
5.0
95
10
LS6OSTG
5.8
22
6 .
LUX 70
6.2
20
16
Type 4
6.7
19 ?
6
Corning
Mate-rials
AC-IBA
1.6
52
53,
AC--IBC
1.7.
50
32_
AD-19
2.4
4.1
31,-
AD-21
4.1
30
17,
AL-62
2.8
38
34
.7)-64
? 4.8-
26
28
AV-12
2.1
45
48.
4'7 -eas
T45 ( Tile 0 .
Corning Materials
Theo.
Meas.
K*
21
%
17
%
0.81
45
25
0.56
53.
33
0.62
52
27
0.47
QU 47n
37
0.62
62
24-
0.39
26
23
0.89
27
25
0..93
"'J A
...,.?
33
0.97
47-
44
0.94
---,.7
36
0.97
52
53
1.00
31
2:1,
094
f
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
. /??'
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A062000010028-2
.,
4;3:7- .63(
Lzi4-ibeziAle
7114 . Z
v-
'
*31
6 ? %
5A/-4/*7
Tq5
v .7. t 1 %
Go.A:.., 0-...,- /, 27
.
A
J11.9
....
1
v ., i s % ?
A
.
4
.
-
-LS?. 4 v Pt
D e -
Ili g --..." ? .14
V = 1 q.
Tv 1- z .
A. -z 69
C I ?
re": _
70.
-1,
Co-40z
)o
le -19
5 - -$1.t?
s
,
G 2 7
7, 1
2.
,
Declassified and Approved For Release 2012/11/08 CIA-RDP79B00873A002000010028-2
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
INbIKULII%.NS IhUK MAKINUUM ISKAND
TYPE 888 COLOR POSITIVE TRANSPARENCIES
3M Brand Type 888 Transparency Film is designed to
Ce exposed either on the 3M Brand "The Ninety Six" In-
rared Transparency Maker-Copier or the 3M Brand
"Secretary" Copying Machine. Type 888 film produces
images in one of five colors -- red, green, blue, orange
or purple -- in approximately four seconds.
LAYUP
Any infrared copyable original material* can be used
to make Type 888 Transparencies in five easy steps.
1. Remove frosted, thin intermediate sheet from top
box and position it over original with notch at upper
right-hand corner, as shown.
2. Remove a clear film transparency sheet from low-
er box and position it over intermediate and original
with notch as shown.
3. Set machine exposure dial (see EXPOSURE SET-
TING, below).
4. Pass this assembly, film side up, through copying
machine.
5.
Separate intermediate from transparency film with
a brisk, peeling motion. Transparency is now
ready for projection.
*The original to be copied must be compatible with the
infrared process. Compatible materials include black
printers ink, graphite pencil, carbon content typewriter
ribbon, black sign pens, India Ink and 3M Brand Black
Transparency Marking Pens.
EXPOSURE SETTING
CLEAR FILM
TRANSPARENCY
SHEET
FROSTED THIN
INTERMEDIATE
SHEET
ORIGINAL
MATERIAL
3M BRAND MODEL 45 "SECRETARY" COPYING MACHINE Set
exposure dial approximately midway between the 6 and 7 dot on
the dial indicator.
NUMBERS SHOWN FOR
REFERENCE ONLY.
DO NOT APPEAR ON
EXPOSURE DIAL.
3M BRAND MODEL 96 TRANSPARENCY MAKER-COPIER: Set WHITE
exposure dial between numbers 3 and 5. This setting will vary
depending on voltage at the location. Use a "Type 888" tab to
show proper setting.
NOTE
Type 888 Red and Orange require develop-
ment at a slightly slower setting on the Model
45 or Model 96.
In order to strengthen red and orange, the
setting should be set at approximately num-
ber 3 on the Model 96 and dot 7 on the Model
45. The colors will then come in much denser.
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2
11)5 AND TIECHNIQL
PEELING INTERMEDIATE:
If the intermediate leaves white specks of material on your transparency, increase the speed of the machine (to 6 on
the Model 45 or 5 on the Model 96), and separate the intermediate and transparency more quickly. Brush lightly with
Cingers to remove specks.
FAINT IMAGE:
If your image is faint, decrease the machine speed by moving the exposure dial to 7 on the Model 45 or 4 on the Model 96.
GHOSTING OR BACKGROUND COLOR TINT:
If you get a faint image from the reverse side of your original, increase machine speed by moving the exposure dial to
dot 6 on the Model 45 or number 4 on the Model 96. Likewise, increase machine speed slightly if your film background
is color tinted.
NO IMAGE:
If no image appears, check your LAYUP procedure.
SILK SCREEN CARRIER:
The silk screen carrier should be used for originals with large black printing areas. The procedures for using this
carrier are as follows:
1. Follow steps 1 and 2 of LAYUP procedure (see front page).
2. Set exposure dial at dot 7 on the Model 45 or about num-
ber 3 on the Model 96.
3. Place this "sandwich" in a silk screen carrier, film side up
and notched end at screen carrier hinge.
4. Continue with steps 4 and 5 of LAYUP procedure.
SILK SCREEN
CARRIER
NOTCHED END
AT SCREEN HINGE
c.,_3M BRAND INFRARED TRANSPARENCY FILMS
YPE
NO. DESCRIPTION CHARACTERISTICS OPERATING TIPS
125 Heavyweight. Positive - clear
background.
127 Heavyweight. Positive - clear
background.
129 Medium weight. Positive-tinted
background. Available inred, blue,
green, and yellow.
128 Heavyweight. Negative. Avail-
able in silver, red, blue, green,
and yellow.
888 Heavyweight colorpositive. Avail-
able in red, blue, green, orange,
and purple.
Etched white image. Image can be colored
with 3M Brand coloring pencil. Excellent
overlay film.
Black image. Easily read on projector
stage. Good lay-flat quality. Excellent
diazo master or master for 3M Brand Type
131 color positive.
Similar to Type 127 but black image on
tinted background. For change of pace and
easy reading on projector stage.
Clear or colored image on dark background.
Excellent for "impact" situations.
Color image on clear background. Excel-
lent for overlays, for change of pace, easy
reading on projector stage. Gives "impact"
to presentations.
Transparencies of photographic quality can also be made from any color or
type of original in either bound or sheet form by using 3M Brand Type 628
Projection Transparency Film with either the 3M Brand "The Seventy"
Transparency Maker-Copier or the 3M Brand "107" Dry Photo-Copier.
3444085-091
Exposure setting for the Model 96 is num-
ber 4.* Exposure setting for the Model 45
is dot 7.
Exposure setting for the Model 96 is be-
tween numbers 4 and 5,.* Exposure setting
for the Model 45 is dot 7.
Exposure setting for the Model 96 is be-
tween numbers 4 and 5.* Exposure setting
for the Model 45 is dot 7.
Exposure setting for the Model 96 is be-
tween numbers 3 and 4.* Exposure setting
for the Model 45 is between dots 7 and 8.
Exposure setting for the Model 96 is be-
tween numbers 3 and 4.* Exposure setting
for the Model 45 is between dots 6 and 7.
*Note: These settings are appropriate for
a line voltage of 120 volts. Dial
settings will be correspondingly
lower for a lower line voltage.
3M Brand Color Positive Type 131 transparencies, for producing a single color
image on a clear background, are available in five colors for use with "The
Seventy" or the "107" Dry Photo-Copier.
Visual Products Divisionalag
Declassified and Approved For Release 2012/11/08: CIA-RDP79B00873A002000010028-2