Development time
Kodak Tri-X 400 in Df96 Monobath
6:45 at 21°C, stock dilution, box speed.
Start timer · 6:45Time
6:45
Minimal
Dilution
Stock
Temperature
21°C
Box speed
ISO 400
B&W
Development time
| Dilution | EI | Time | Temp | Agitation | Timer |
|---|---|---|---|---|---|
| Stock | 400 | 6:45Not yet verified | 21°C / 70°F | Minimal | Start timer |
EI is the speed the film was rated at when shooting. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet.
Other temperatures
| 18°C | 19°C | 20°C | 21°C | 22°C | 23°C | 24°C |
|---|---|---|---|---|---|---|
| 9:23 | 8:24 | 7:30 | 6:45 | 6:00 | 5:24 | 4:53 |
Calculated from the 21°C time using Ilford’s temperature compensation factors, not taken from a datasheet. Most B&W developers behave well between 18°C and 24°C.
Mixing
| Dilution | 300 ml (one 35mm roll) | 500 ml (one 120 roll) |
|---|---|---|
| Stock | Use as mixed, undiluted | Use as mixed, undiluted |
How they work together
- Df96 Monobath
- Prominent grain, moderate acutance, full film speed, high contrast. Increased contrast compared to traditional development.
- Kodak Tri-X 400
- A classic photojournalism film with a long heritage. Known for its distinctive gritty grain, high contrast, and strong push-processing capability.
- Notes on this pairing
- Temperature critical at 21°C. Monobath process.