(6) Push the film as far as possible into the
(4) In darkness or under an appropriate
open side of the center core, and turn the reel a half turn
safelight, place the spool of film ;w be developed on the
counterclockwise to secure the film in the core.
(7) Hold the end of the film in place with the
(5) Holding the loader approximately level,
index finger gently pressing the film against the center
slide the film through until it is firmly under the clip,
of the reel.
which should be raised with the clip lever or with your
(8) Holding the loader by its outside bracket
arms only, turn the reel counterclockwise until all film is
(6) Throw off the locking lever and wind the
wound onto the reel. Do not touch the loading guide
film on the reel by rotating it slowly and evenly.
itself during winding.
(7) In damp weather or with thin film it will be
(9) To remove the loader, pull it off the reel.
found that the film will wind more smoothly if a tension
is applied by means of the film spool brake, particularly
b. Photographic Supplies.
The operator shall
toward the end of the winding. Only a little tension is
make certain that the proper chemicals and
generally needed but a few trials with a test film will
photographic paper are available at all times, and also
quickly show whether or not tension is required.
be thoroughly indoctrinated in the procedures for
d. Use of Enlarging Meter for Measuring Density
developing black and white and color films, and
. When using the enlarging meter (fig. 1-6)
for measuring the density difference between two
c. Loading Stand. To use the loading stand shown
negatives, make certain that the position of the meter
with respect to each negative remains the same. To
(1) Swing the loader to the right until it rests
prevent excess light from reaching the meter, each
on the film spool axle.
negative should be masked with black paper having a
(2) Push the reel on the reel axle.
1/2 inch square opening.
(3) Swing the locking level to hold the arm of
the reel marked "X" bin its outer end. This positions the
2-7. Operator's Controls and Indicators
clip for starting.
a. Equipment Covered by Technical Manuals.
Refer to appendix A for the technical manual covering
the operator's controls and indicators for the diffusion
transfer kit, enlargers, print processors, processing unit,
and air conditioners.
b. Ditto Machine. Refer to the instruction manual
contained in the Ditto machine accessory kit.
c. Space Heater.
Control or indicator
Controls darkroom temper-
room thermostat (fig. 1-
HEATER .... Controls
FAN............ Controls ven-
OFF............ Shuts off
Red indicating light............
Glows red when heater
fails to start or stops due