Development time
Foma Bohemia Foma Ortho 400 in Rodinal
10:00 at 20°C (68°F), 1+50 dilution, box speed.
Start timer · 10:00- Time
- 10:00
- Dilution
- 1+50
- Temperature
- 20°C
- Box speed
- ISO 400
Development time
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| 1+50 | 400 | 10:00 | 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 |
|---|---|---|---|---|---|---|
| 12:30 | 11:12 | 10:00 | 9:00 | 8:00 | 7:12 | 6:30 |
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+50 | 5.9 ml developer + 294 ml water | 9.8 ml developer + 490 ml water |
How they work together
- Rodinal
- Prominent grain, high acutance, full film speed, variable contrast. Sharp, dramatic, distinct edge effects.
- Foma Bohemia Foma Ortho 400
- Orthochromatic black-and-white negative film, ISO 400/27 (Foma datasheet: RMS 17.5, 85 lp/mm), with high green sensitivity and high maximum density; handle under orange safelight (585 nm and above), never green. Sold as 120, 35mm 135-36 and sheet film (sheet sizes not stated).
- Notes on this pairing
- Fomadon R09 (Foma's Rodinal-type developer). Datasheet gives 10 to 12 min; lower figure used.
Foma Ortho 400 in other developers
D-76
7:00
Stock · EI 400 · 20°C · 2 variants
Fomadon Excel
7:00
Stock · EI 400 · 20°C · 2 variants
Fomadon LQN
8:30
1+10 · EI 400 · 20°C · 2 variants
Fomadon P
9:30
Stock · EI 400 · 20°C · 2 variants
ID-11
7:00
Stock · EI 400 · 20°C · 2 variants
Microphen
8:00
Stock · EI 400 · 20°C · 2 variants
Perceptol
9:00
Stock · EI 400 · 20°C · 2 variants
Other films in Rodinal
Kodak Tri-X 400
7:00
1+25 · EI 400 · 20°C · 3 variants
Ilford HP5 Plus
6:00
1+25 · EI 400 · 20°C · 4 variants
Ilford Delta 400
9:00
1+25 · EI 400 · 20°C · 4 variants
Ilford FP4 Plus
9:00
1+25 · EI 125 · 20°C · 4 variants
Foma Bohemia Fomapan 400 Action
5:30
1+25 · EI 400 · 20°C · 5 variants
Harman Technology Kentmere Pan 400
17:00
1+25 · EI 400 · 20°C · 3 variants
Ilford Ilford Delta 100
9:00
1+25 · EI 100 · 20°C · 4 variants
Kodak Double-X 5222
5:45
1+25 · EI 250 · 20°C · 3 variants