Appendix
© Copyright 2008 Panoramic Corporation
The darkroom must be lighttight. Extraoral (panoramic/cephalometric) fi lm is more
sensitive than intraoral (bite-wings) fi lm to light, and processing time and temperature.
Manual Processing
• Lighttight darkroom • Dip tanks • Timer • Thermometer
• Developer and fi xer solutions • Film Hanger • Water supply and drain
• Safelight (GBX-2 fi lter or equivalent, 15 W bulb or less and at least 4' from fi lm)
1. Prepare developer and fi xer solutions according to the solution's directions.
2. Verify developer temperature.
3. Under safelight conditions, remove the exposed fi lm from the cassette sleeve and attach it to a fi lm
hanger.
4. Set the timer based on the developer temperature and the processing chart.
5. Immerse the fi lm quickly into the developer and agitate it vigorously for only 5 seconds to dislodge
any air bubbles.
6. When the timer sounds, remove the fi lm from the developer and immediately rinse it with water for 30
seconds while agitating it. Do not allow the excess developer to drain back into the developer tank.
7. Immerse the fi lm into the fi xer and agitate it for 5 seconds every 30 seconds. Allow the excess fi xer to
drain back into the fi xer tank.
8. Immerse the fi lm in the water wash tank and rinse it thoroughly.
9. Dry the fi lm at room temperature or in a drying cabinet.
Automatic Processing
A thermometer should be present to periodically verify the temperature. It is imperative that the
processor's maintenance schedule is followed thoroughly.
Manual Processing Automatic Processing
Developer Rinse Fixer Wash
Film Type Temperature Time
T-MAT 68º F 20.0º C 8 min 30 sec 2-4 min 5 min 82º F 28.0º C 5.5 min
(for use 72º F 22.0º C 7 min 60º F 15.5º C 60º F 15.5º C 60º F 15.5º C 83º F 28.5º C 4.5 min
with Lanex 76º F 24.5º C 5 min to to to 85º F 29.5º C 4 min
screens) 80º F 26.5º C 4 min 85º F 29.5º C 85º F 29.5º C 85º F 29.5º C
Darkroom Procedures
Note: Extraoral fi lm requires more frequent solution replenishment than intraoral fi lm. One ounce of
chemicals are typically required for replenishment for every 75 intraoral, 3 panoramic, or 2 cephalometric
fi lms.
B
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