FILM QUALITY PROBLEMS
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SYMPTOMS AND ACTION
Symptom:
Films too dark or fogged.
Action:
1. Test for light fogging by feeding an unexposed film through the
machine. It should process as a transparent piece of film base with
no signs of shadows or blackness evident.
2. If there is light fogging, proceed as follows:-
a) Check that the daylight loader cover is firmly in place.
b) Check very closely for other possible light leaks: ensure that
the machine has not been sited in direct sunlight or in intense
lighting conditions (e.g. directly under strip lights or spotlights).
Do not take your hands out of the daylight loader before the
film has fed completely into the machine.
(Fog at one end only of the film indicates premature removal
of hands from daylight loader).
Check hand entry ports to ensure there is a good light seal
around the wrists -if not, call for service.
c) Check whether films have been stored too close to x-ray
source, and re-locate.
d) Check expiry date on film box to ensure films are not out of
date. (Keep films in a cool, dry place: excessive heat can cause
premature ageing of film).
3. Check that there has been no chemical mix-up, leading to cross-
contamination.
4. Check temperature of developer and fixer tanks. This is generally
set at 27°C (81 °F). A substantial difference could lead to dark film.
Switch off the machine and call for service.
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20/08/2007 17
SPRINT
MkV
