Development time
Kodak Vision3 250D 5207 in Bellini ECN-2 Kit
3:00 at 41°C (106°F), stock dilution, box speed.
Start timer · 3:00- Time
- 3:00
- Dilution
- Stock
- Temperature
- 41°C
- Box speed
- ISO 250
Continuous 15s, then every 30s
106°F
ECN-2
Development time
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| Stock | 250 | 3:00 | 41°C / 106°F | Continuous 15s, then every 30s | ManufacturerChecked Oct 2026 | Start timer |
EI is the speed the film was rated at when shooting. Evidence says where each time comes from: the manufacturer’s own data, a named test, a compilation or several agreeing reports (community consensus), or one person’s report. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet. Where sources give different times, every one is listed and marked “sources differ”.
Other temperatures
Colour developers run at 41°C (106°F) with a tight tolerance of around ±0.3°C, so there’s no reliable temperature chart. If you can’t hold the temperature, follow your kit’s instructions for its lower-temperature times.
Mixing
| Dilution | 300 ml (10.1 fl oz) (one 35mm roll) | 500 ml (16.9 fl oz) (one 120 roll) |
|---|---|---|
| Stock | Use as mixed, undiluted | Use as mixed, undiluted |
How they work together
- Kodak Vision3 250D 5207
- Medium-speed daylight-balanced motion picture negative with remjet backing; widely respooled for still cameras.
- Notes on this pairing
- Kit time; applies to any ECN-2 film. Developer at 41.0 ±0.2 °C for films 1 to 6; 3:30 for films 7 to 12. Remove rem-jet by hand in warm water after the pre-bath.