Development time
Adox CMS 20 II PRO in ADOX Adotech IV
11:00 at 24°C (75°F), 1+14 dilution, box speed.
Start timer · 11:00- Time
- 11:00
- Dilution
- 1+14
- Temperature
- 24°C
- Box speed
- ISO 20
Minimal
75°F
B&W
All 6 times
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| 1+14 | 3−2⅔ stops | 7:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+14 | 6−1⅔ stops | 10:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+14 | 10−1 stop | 10:30 | 22°C / 72°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+14 | 12−⅔ stop | 10:00 | 23°C / 73°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+14 | 20 | 11:00 | 24°C / 75°F | Minimal | ManufacturerChecked Oct 2026 | Start timer |
| 1+14 | 25+⅓ stop | 11:00 | 26°C / 79°F | Minimal | 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 |
|---|---|---|---|---|---|---|
| 21:09 | 18:57 | 16:55 | 15:14 | 13:32 | 12:11 | 11:00 |
Calculated from the 24°C (75°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+14 | 20 ml developer + 280 ml water | 33 ml developer + 467 ml water |
How they work together
- Adox CMS 20 II PRO
- Document-film based ortho-panchromatic stock with extreme resolution (up to 800 lp/mm) that needs ADOX ADOTECH developer for pictorial contrast; rated ISO 12-20.
- Notes on this pairing
- Adotech IV; first 30 s constant, then once every minute. Temperature is of the working solution at the start; do not hold it in a water bath.
- Adotech IV; first 30 s constant, then once every minute. Datasheet gives 10.5 to 11 min; lower figure used.
- Adotech IV; first 30 s constant, then once every minute. Working solution at 22 °C.
- Adotech IV; first 30 s constant, then once every minute. Working solution at 23 °C.
- Adotech IV; first 30 s constant, then once every 2 min. Working solution at 24 °C; normal contrast.
- Adotech IV; first 30 s constant, then once every 2 min. Working solution at 26 °C; slightly higher contrast (N+0.5).