j. At the end of the correct developing time, transfer the film, one at
a time, to the stop bath. Then, leaf through the pile twice. Keep track of
the order in which the film was placed in the developer, so it can be put
into the stop bath in the same order.
Failure to do so can result in
overdevelopment of some of the film.
k. Transfer the sheets of film, one at a time, to the fixer. Continue
replacement from bottom to top throughout the entire time required for
l. Wash the negatives thoroughly in running water for 30 minutes (less
time if hypo eliminator is used) using the rotation method or by placing the
negatives in hangers and using a washing tank.
m. After the washing is completed,
rotating the sheets for one minute.
n. Finally, attach a clip to one corner of each negative and hang the
negatives in a drying cabinet. Excess surface moisture is best removed with
a viscous sponge.
10. Tank processing of sheet film. In a tank, developer is less exposed to
the action of air. As a result, solutions in a tank last longer and can be
used for processing a larger quantity of film than solutions in a tray. To
process sheet film in a tank, use the following procedures:
a. Use a least three tanks - one for developer, one for the stop bath,
and one for the fixer
b. Bring the solution to the correct temperature and set the time for
the appropriate development time.
c. Arrange sheet film holders and film developing hangers so they are
easily accessible. Then turn off the lights.
d. Remove the film from the holders and load them into the hangers.
e. Start the timer and lower the hangers into the developer.
f. Agitate the hangers vertically in the solution for about 10 seconds,
striking the tops of the hangers sharply against the top of the tank once or
twice to dislodge air bubbles clinging to the film.
g. Leave the hangers undisturbed for one minute.
Then lift the hangers
clear of the solution, tilting them to the left