Development time
Rollei/Maco RPX 25 in Rollei Supergrain
4:30 at 20°C (68°F), 1+9 dilution, box speed.
Start timer · 4:30- Time
- 4:30
- Dilution
- 1+9
- Temperature
- 20°C
- Box speed
- ISO 25
All 3 times
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| 1+9 | 25 | 4:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+12 | 25 | 5:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+15 | 25 | 6:30 | 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 |
|---|---|---|---|---|---|---|
| 5:38 | 5:02 | 4:30 | 4:03 | 3:36 | 3:14 | 2:56 |
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+9 | 30 ml developer + 270 ml water | 50 ml developer + 450 ml water |
| 1+12 | 23 ml developer + 277 ml water | 38 ml developer + 462 ml water |
| 1+15 | 19 ml developer + 281 ml water | 31 ml developer + 469 ml water |
How they work together
- Rollei/Maco RPX 25
- Rollei's low-speed panchromatic film with extraordinarily fine grain (RMS 8), very high resolving power (260 lp/mm) and high silver content on a clear 100 micron polyester base. Wikipedia considers it Agfa Aviphot 80 PE1.
RPX 25 in other developers
Other films in Rollei Supergrain
Foma Bohemia Fomapan 400 Action
6:00
1+9 · EI 400 · 20°C · 3 variants
Rollei/Maco RPX 400
6:00
1+9 · EI 400 · 20°C · 3 variants
Foma Bohemia Fomapan 100 Classic
5:30
1+9 · EI 100 · 20°C · 3 variants
Foma Bohemia Fomapan 200 Creative
5:30
1+9 · EI 200 · 20°C · 3 variants
Foma Bohemia Retropan 320 Soft
6:30
1+9 · EI 320 · 20°C · 2 variants
Rollei/Maco Retro 80S
6:00
1+9 · EI 80 · 20°C · 3 variants
Bergger Pancro 400
9:30
1+9 · EI 400 · 20°C · 2 variants
Rollei/Maco RPX 100
5:30
1+9 · EI 100 · 20°C · 4 variants