Development time
Foma Bohemia Fomapan 400 Action in T-Max Developer
7:00 at 20°C (68°F), 1+4 dilution, box speed.
Start timer · 7:00- Time
- 7:00
- Dilution
- 1+4
- Temperature
- 20°C
- Box speed
- ISO 400
Development time
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| 1+4 | 400 | 7:00 | 20°C / 68°F | Standard | 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
| 18°C64°F | 19°C66°F | 20°C68°F | 21°C70°F | 22°C72°F | 23°C73°F | 24°C75°F |
|---|---|---|---|---|---|---|
| 8:45 | 7:50 | 7:00 | 6:18 | 5:36 | 5:02 | 4:33 |
Calculated from the 20°C (68°F) time using Ilford’s temperature compensation factors, not taken from a datasheet. Most B&W developers behave well between 18–24°C (64–75°F).
Mixing
| Dilution | 300 ml (10.1 fl oz) (one 35mm roll) | 500 ml (16.9 fl oz) (one 120 roll) |
|---|---|---|
| 1+4 | 60 ml developer + 240 ml water | 100 ml developer + 400 ml water |
How they work together
- T-Max Developer
- High acutance, full film speed, normal contrast. Enhanced shadow detail in normally processed and push-processed film.
- Foma Bohemia Fomapan 400 Action
- Traditional cubic-grain 400 film (Foma datasheet: RMS 17.5, 90 lines/mm). Rated ISO 400/27; the maker says it gives good results from EI 200 to EI 1600 without changing development.
- Notes on this pairing
- Kodak T-Max Developer 1+4. Guide gives 7 to 8 min; lower figure used (lower value gives lower contrast). Spiral tank: continuous for the first 30 s, then 10 s each minute.
Fomapan 400 Action in other developers
D-76
7:30
Stock · EI 400 · 20°C · 2 variants
Df96 Monobath
6:00
Stock · EI 400 · 21°C
Fomadon Excel
7:00
Stock · EI 400 · 20°C · 2 variants
Fomadon LQN
9:00
1+10 · EI 400 · 20°C · 3 variants
Fomadon P
10:00
Stock · EI 400 · 20°C · 2 variants
HC-110
6:30
1+31 · EI 400 · 20°C · 2 variants
ID-11
7:00
Stock · EI 400 · 20°C · 4 variants
Microphen
8:00
Stock · EI 400 · 20°C · 4 variants
Other films in T-Max Developer
Kodak Tri-X 400
6:00
1+4 · EI 400 · 20°C · 7 variants
Kodak T-Max 400
6:45
1+4 · EI 400 · 20°C · 16 variants
Ilford HP5 Plus
6:30
1+4 · EI 400 · 20°C · 4 variants
Ilford Delta 400
6:30
1+4 · EI 400 · 20°C · 6 variants
Ilford FP4 Plus
8:00
1+4 · EI 125 · 20°C · 2 variants
Ilford Ilford Delta 100
7:00
1+4 · EI 100 · 20°C · 3 variants
Kodak T-Max 100
7:30
1+4 · EI 100 · 20°C · 10 variants
Kodak T-Max P3200
12:00
1+4 · EI 3200 · 20°C · 15 variants