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.