Development time
Fujifilm Neopan 400 Professional in T-Max Developer
6:00 at 20°C (68°F), 1+4 dilution, box speed.
Start timer · 6:00- Time
- 6:00
- Dilution
- 1+4
- Temperature
- 20°C
- Box speed
- ISO 400
All 6 times
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| 1+4 | 400 | 6:00 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+4 | 400 | 4:30 | 24°C / 75°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+4 | 800+1 stop | 7:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+4 | 800+1 stop | 5:15 | 24°C / 75°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+4 | 1600+2 stops | 10:00 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+4 | 1600+2 stops | 8:00 | 24°C / 75°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 |
|---|---|---|---|---|---|---|
| 7:30 | 6:43 | 6:00 | 5:24 | 4:48 | 4:19 | 3:54 |
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.
- Fujifilm Neopan 400 Professional
- Professional monosize cubic-grain 400 B&W film (Presto in Japan), produced from 1978.
- Notes on this pairing
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. T-MAX Developer (dilution not stated on the sheet; Kodak's standard is 1+4).
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. One-stop push. T-MAX Developer, dilution not stated (Kodak standard 1+4).
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. Two-stop push. T-MAX Developer, dilution not stated (Kodak standard 1+4).
Neopan 400 Professional in other developers
Other films in T-Max Developer
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6:00
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6:45
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6:30
1+4 · EI 400 · 20°C · 4 variants
Ilford Delta 400
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Ilford FP4 Plus
8:00
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Foma Bohemia Fomapan 400 Action
7:00
1+4 · EI 400 · 20°C
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