ANSCOCHROME - ABD-4 DRYER TEST

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A000100060001-4
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: March 20, 2000
• Sequence Number: 1
• Publication Date: May 20, 1964
• Content Type: MEMO

25X1A
ApproveMrARelease 2000/05/lrr~5R~470006
TO: FROM:
SUBJECT: Anscochrome - ABD-4 Dryer Test
25X1A COPIES: File
Project No. 134
OBJECTIVE:
To determine if Anscochrome T-100 can be dried in the ABD-4 dryer.
EQUIPMENT: Morse B-5 wind rewind processor.
PROCEDURE:
1. The necessary Anscochrome chemicals were mixed and stored in 5 gallon glass
bottles and stainless steel containers.
2. Prior to running any film through the dryer, it was checked out for mechanical
performance.
3. An idler roller and air squeegee assembly was installed between the load spool
and the first vacuum capstan on the dryer.
4. The transport speed of the dryer was set to 10 FPM by use of a calibrated tach-
ometer. All subsequent speed adjustments were made in a like manner.
5. Two direct reading RH meters were used in conjunction with all drying tests.
One meter was placed in the bottom of the dry cabinet, and one was placed adjacent
to the dryer to monitor the ambient RH. Each RH meter and the dry-cabinet tempera-
ture was monitored and recorded during each film run. The ambient temperature was
75?F + 3?F wring all tests.
6. With the exception of the last roll of Anscochrome run (Test #6-A, B, C) all
film after processing was wound on a load spool while wet, and fed into the dryer
from the load station (see attached sketch).
Tests 6A-6C were left on the. Morse spool after, proce.sging, the spool assembly was
put on its side in the Morse final rinse tank (still filled with Anscochrome. final
rinse) and the film was fed into the dryer from the immersed spool.
7. Prior to running Anscochrome, a roll of B & W (5427), which had been rewound
on the Morse B-5 processor for 30 minutes and then soaked over night in water was kun
in the dryer as follows:
TEST NO. 1
Transport speed 8.05 FPM, dryer recirculation control in closed position,
ambient RH 50%, dry box RH 28%, dry box temperature 120?F, with air squeegee off.
Declassification Review by NIMA/DOD
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(2)
Transport speed 8.05 FPM, dryer recirculation control in closed position,
ambient RH 50%, dry box RH 28%, dry box temperature 120?F, with air squeegee
on. Water was poured on the emulsion side of the film to simulate film coming
out of a processor wet section.
TEST NO. 3
All conditions as in test No. 2, except the air squeegee was off. The B & W
film was run prior to the Anscochrome in order to assure proper dryer operation
and to evaluate conditions under which the color film would be run.
8, Approximately 25 feet of Anscochrome T-100 was partially processed in the
Morse B-5 processor using the normal Anscochrome 80? processing chemicals
and times. This process was discontinued at the color short stop hardener.
9. Approximately 25 feet of Anscochrome T-100 was processed in the Anscochrome
R-1 75? process, which includes a prebath solution.
10. TEST NO. 4
Anscochrome drying test was run as follows:
Transport speed 10 FPM (2 minutes drying time), dryer recirculation control in
closed position, ambient RH 37.5%, dry box RH 5%, dry box temperature 107?F,
with air squeegee on. b
11. TEST 5
Transport speed 10 FPM, dryer recirculation control in closed position,
ambient RH 44.5%, dry box RH 12%, dry box temperature 110?F, with air squeegee
on.
12. 100 feet of Anscochrome was processed in the R-1 75? process.
13. TEST #6-A
Anscochrome test was run as follows:
Film was fed into the dryer as described in procedure, paragraph 6, for this
test and #6-B and #6-C.
Transport speed 10 FPM, dryer recirculation control in closed position, air
squeegee on.
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Ambient RH
Dry Box RH
Dry Box Temp.
Film entering dry box:
56%
21.5%
110O F
End of film out of dry box:
55%
27%
108.5?F
The dryer was stopped shortly after the film reached the take up station in order
to rewind it onto the spool emulsion out. From this point on the film was hand-wound
onto the spool emulsion out.
14. TEST #6-B
Transport speed 10 FPM, dryer recirculation control in closed position, air
squeegee on.
Ambient RH_ _
_ Dry Box RH
Dry Box Temp.
Film entering dry box
53%
10%
120?F
End, of film out of dry box
53%
16%
116?F
15. TEST #6-C
Film transport speed 5 FPM (7 minutes drying time), dryer recirculation control
half open position (50% recirculation), air squeegee on.
Ambient RH
Dry Box RH
Dry Box Temp.
Film entering dry box
53%
10%
116.50F
End of film out of dry box
RESULTS
52%
5%
12 0? F
1. With the dryer transport speed set for 10 FPM, tachometer readings indicated
a speed variation of minus 0.57 FPM and plus 0.25 FPM.
2. TEST #1
The film transport had to be stopped in order to re-align the film due to a
splice that hung up in the dry box. The film dried, but this was because the
drive was stopped. Physical quality was satisfactory.
3. TEST #2
The film dried satisfactorily. Physical quality was satisfactory.
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4. TEST #3
The film did not dry. Physical quality was satisfactory.
5. The first 25 foot length of Anscochrome processed in the Morse B-5 using
the normal 80?F Anscochrome procedure was lost, due to most all of the emulsion
stripping away from the base. The Anscochrome processed per the R-1 75? pro-
cedure exhibited no physical damage.
6. TEST 4
No leader was spliced to the tail end of the 25 foot length of Anscochrome
which prevented running the film completely through the dryer. Result was in-
conclusive.
7. TEST 5
The Anscochrome swelled to approximately 1/32 inch wider than the leader.
to which it was spliced causing it to hang up on"the dry box.air bearing flanges.
The flanges were re-adjusted to accommodate this swell. The test result was
inconclusive.
8. TEST #6-A
The test film did not dry.
There was no physical damage.
9. The dryer was stopped shortly after the film started to wind on the take up
spool, since the curl of the emulsion-in film would not wind up correctly. The
film was rewound emulsion out by hand for this and subsequent tests.
10. TEST #6-B
The film at the take up was tacky (almost dry). There was no physical damage.
11. TEST #6-C
The film started to dry at the third air bearing after en trance into the dry box,
this was evidenced by observing that the film started to curl at this point. The
film was dry and without excessive curl at the take up. There was no physical
damage.
CONCLUSIONS:
1. The flanges on the dryer air bearings must be readjusted to accommodate the
increased width of wet Anscochrome due to swelling.
2. Anscochrome film will not dry in the ABD-4 dryer in its present form unless
the dry box temperature is between 115 - 120?F, relative humidity between 5 - 10%,
at 5 FPM, using an air squeegee with the dryer set to recirculate 50% of the dry-
box air.
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