Figure 15. Sheet film identification notches
The original box from which the sheet film was taken has the notched
identification code printed on it.
2. Developing methods. Besides using automatic film processors, which are
not covered in this subcourse, there are only two processing methods: tray
and tank processing. Tray processing involves the use of rectangular trays.
Tank processing employs an open tank or closed daylight processing tank (fig
16). A daylight tank is equipped with a lighttight cover, and processing
solutions are poured in and out, without removing the lid, through a light
trap located in the center of the cover.
a. The best developing method to use is determined, primarily, by the
type of film being processed. Another factor to consider is the equipment
available for processing the film.