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TM 11-405-10
(14) When the desired developing time has
elapsed, pour out the developer solution.
(15) Rinse, fix, and wash the negatives (par.
25. Developing Roll Film (fig. 31)
To develop roll film by using Tank PH-186 or
Photographic Processing Tank FM-12(1), proceed as
follows:
a. Place the upper film flange on the lower film
flange and secure with the thumbscrew.
b. Turn off the darkroom lights and disassemble
the film cartridge.
c. Insert the end of the exposed film roll, with the
emulsion (dull) side in, in the slots of the upper and lower
film flanges; gently push the remaining film into the reel.
d. Place the reel in the tank body (with the
thumbscrew on top).
e. Turn on the darkroom lights.
f. Check the temperature of the developer solution
(TM 11-401), start the continuous timer, and pour the
developer solution into the tank body through the light
proof hole in the cover.
g. Insert the agitator through the light proof hole
and turn the reel.
h. Remove the agitator and place the cap over the
light proof hole.
Figure 31. Task PHI-186 or Photographic Processing
i. Gently rock the roll film tank to accelerate the
Tank FM-12(1).
developing action and to eliminate air bubbles. Repeat
the rocking action several times during the developing
(2) Pour out the rinse water.
process.
b. Fixing.
j.. When the desired developing time has elapsed,
(1) Fill the tank (cut-film or roll-film) with fixing
remove the cap and pour the developer solution from the
solution (par. 22).
tank body.
(2) Gently rock the tank to start the fixing
k. Rinse, fix, and wash the negative (par. 26).
process.
26. Processing Negatives
(3) Allow the tank to stand still until the fixing
After the film (cut or roll) has been developed (par. 24 or
is complete. The usual fixing time is from
25), process the negatives as follows':
10 to 15 minutes or twice the time it takes
Note. All processing solutions should be maintained at
the film to clear (TM 11-401).
the specified temperatures.
Note.
After the fixing process is
a. Rinsing.
complete, light will not harm the negatives.
(1)
Circulate rinse water among the
(4) Pour out the fixing solution.
negatives. The usual rinsing time is from 30 to 60
c. Washing.
seconds (TM 11-401).
(1) Wash the negatives with fresh, running
water for at least 30 minutes.
(2) Pour out the washing water.
(3) Remove the negatives from the tank and
wipe excess water from both sides of each
negative.
d. Drying. Hang the negatives up to dry in a clean,
dust-free
area.
AGO 6894A
39

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