Correcting Difficulties
IMPORTANT
• Many film transport and sensitometric difficulties can be caused or aggravated by inadequate
hardening of the emulsion due to underreplenishment of the developer and fixer solution.
• Another cause of inadequate hardening of the emulsion may be deterioration of the developer
replenisher because of age or storage at too high a temperature. Do not mix more than a 2-week
supply of developer replenisher.
1. Transport Failure
2. Surface Artifacts
3. Abnormal Film Densities
4. Wet Films
5. Low Solution Levels
6. Overlapping of Films
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••Film Feeding Error
Feed only single thicknesses of film. Feed the next film only
after the film feed signal sounds. If there is no film feed signal,
refer the difficulty to qualified personnel.
•••• Feed only compatible films.
••Check that all racks and crossovers are seated correctly.
•• Check that the surfaces of all the rollers are clean and smooth, especially in
the developer turnaround assembly.
••Check that the dryer air tubes are in the correct positions.
•• Remove any dirt from the dryer rollers and air tubes, especially the slots.
Use a bottle brush and rinse with water.
•••• Check the settings for correct replenishment. Check the replenishment
system: kinks, pump operation, detector switches, and replenishment pump.
• Adjust the dryer temperature control setting to the lowest possible
temperature that still allows good drying.
• Clean the feed shelf and detector rollers.
•• •Clean any bacterial growth in the wash tank with a mild solution of chlorine
bleach. Use 60 mL (2 fluidounces) of bleach per 3.8 L (1 gallon) of water.
Wipe tanks with a soft sponge.
••Check that the weirs are seated correctly.
Check that the tanks are full.
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