NOIR | Kōun 125 Film Development Chart
Film Background
Kōun 125 is a respooled black-and-white aerial surveillance film, derived from fresh Agfa Aviphot stock but tested and optimized for shooting at ISO 125. It offers fine grain, rich tonal depth, and a slightly extended red sensitivity that enhances contrast and detail in a wide range of lighting conditions. Its modern coating and stable emulsion allow for excellent results across multiple developers and workflows, making it ideal for both traditional and experimental black-and-white photography.
| Developer | Dilution | ISO Rating | Development Time | Temperature | Agitation | Notes/Results |
|---|---|---|---|---|---|---|
| D-76 / ID-11 | 1:1 | 125 | 9 min | 20°C (68°F) | Standard | Balanced tones, moderate contrast, fine grain |
| Rodinal | 1:50 | 125 | 11 min | 20°C (68°F) | Standard | Pronounced grain, strong edge sharpness |
| HC-110 | 1:31 (Dilution B) | 125 | 7.5 min | 20°C (68°F) | Standard | Snappy contrast, good highlight control |
| XTOL | 1:1 | 125 | 8.5 min | 20°C (68°F) | Standard | Smooth tonality and excellent midtones |
| Eco Pro | 1:1 | 125 | 8.5 min | 20°C (68°F) | Standard | Clean results, versatile tonality |
* These times are recommended starting points. Variations in exposure, agitation, and scanner workflow may affect your final results. Test and adjust according to your preferences and shooting conditions.
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