5 OPERATION
5-24
EM210F-1
Table 5.1 Consequence of faulty film processing
Appearance
Possible cause
●
No picture
Film inserted into cassette
upside-down.
●
Complete blackening
Magazine lid inadvertently opened
while being carried.
●
Fogging
Faulty safelight.
Film processing date has expired.
●
High density
Developer temperature too high.
●
Low density
Developer temperature too low.
●
Too grainy
Developing time too long.
●
Uneven density
Developing time too short.
Effete
developer.
●
Spotty staining
(mottled)
Developer agitation insufficient.
Film electrostatically charged before
developing.
●
Scratches, streaks
Film emulsion surface rubbed.
●
Discoloration of film
during storage
Fixing and rinsing insufficient.
●
Moldy film
Method and place of storage unsuitable.
Drying
insufficient.
●
Extraneous
particulates
Impurities in tap water.
●
Blisters on film
Water droplets left on film before
drying.
●
Reticulation
Tap water temperature too high.
