Suppose that a processed roll of photofluorographic film shows small oval areas
at the beginning and end of the roll. What is the cause?
a. Loose lid on the processing tank.
b. Contact of leader and trailer ends with the film.
Film not wound completely on the spool and overlapping.
d. Processing chemicals below the proper developing level.
To avoid static electricity on roll film, it may be necessary to:
a. Immerse the roll in water.
b. Rub the roll with a piece of wool.
Trim the trailer from the film.
d. Install the roll in a tank of developer.
Hand processing of roll film should be carried out at what temperature?
A "stop bath" is made with water and:
b. Wetting solution.
d. Sodium sulfate.