both film and paper.
These require a change in chemistry when going-from one
medium to the other.
4. The processor is designed to be installed outside the darkroom, with the
film entrance inside or against a light-tight opening into the darkroom wall.
This allows darkroom personnel to feed unprocessed film directly into the
processor without exposing it to light.
5.
The operation of a processor is as follows:
a. Film is fed into the feed entrance (fig 1-1(1)).
b. Film enters the developer tanks (fig 1-1(2)).
c. It is carried to the tank bottom and back to the top (fig 1-1(3)).
d. It then goes onto the fix tanks and the remaining tanks in the same
manner (fig 1-1(4)).
e. The dryer section receives the film from the squeegee assembly and
transports it downward and then upward between air tubes, which direct hot air
onto both sides (emulsion and base) of the film (fig 1-1(5)).
f. The processed and dried negative or transparency then passes into a
receiving bin (for sheet film) or onto a take-up adaptor (for roll film) (fig
1-1(6)).
Figure 1-1.
Basic operating procedure of a film processor
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