Developing Roll Film

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.

26).

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