Symptom |
Cause |
Correction |
| Yellowish colour on unexposed portion. |
Over developed. |
Add density reducer, check PH. Adjust
replenishment rate. |
| Pictures look flat, or purple colour in
the black area |
Under developed |
Add density booster, check PH. Adjustment
replenishment rate. |
| Prints too magenta, can be corrected,
colour balance normal. |
PH too high. |
Use PH reducer. |
| Prints too green, can be corrected,
colour balance normal. |
PH too low. |
Use PH booster. |
| Prints too blue, can be corrected,
colour balance normal. |
PH too high on both film and paper developer. |
Adjust PH. |
| Prints too yellow, can be corrected,
colour balance normal. |
PH too low on both film and paper developer. |
Adjust PH. |
| Prints too cyan. |
Film developer in trouble. |
See C41 film developer diagnostics |
| Prints too red, can not be corrected. |
Paper developer contaminated. |
Discard and restart new paper developer. |
| New developer, prints too magenta, too
dark. |
No starter. |
Use starter. Dilute with water if necessary. |
| Red Colour is brownish, other colours and
contrast are good. |
Light source lack of cyan colour. |
Replace light bulb. |
| Filter plugged frequently. |
Low utilization. |
Use antioxidant. |
