Development time
Ilford Ilford Delta 100 in PMK Pyro
11:00 at 21°C, 1+2+100 dilution, EI 80 (−⅓ stop).
Start timer · 11:00Time
11:00
Standard
Dilution
1+2+100
Temperature
21°C
Box speed
ISO 100
B&W
Development time
| Dilution | EI | Time | Temp | Agitation | Timer |
|---|---|---|---|---|---|
| 1+2+100 | 80−⅓ stop | 11:00 | 21°C / 70°F | Standard | Start timer |
EI is the speed the film was rated at when shooting. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet.
Other temperatures
| 18°C | 19°C | 20°C | 21°C | 22°C | 23°C | 24°C |
|---|---|---|---|---|---|---|
| 15:17 | 13:41 | 12:13 | 11:00 | 9:47 | 8:48 | 7:57 |
Calculated from the 21°C time using Ilford’s temperature compensation factors, not taken from a datasheet. Most B&W developers behave well between 18°C and 24°C.
Mixing
| Dilution | 300 ml (one 35mm roll) | 500 ml (one 120 roll) |
|---|---|---|
| 1+2+100 | See the developer’s instructions | See the developer’s instructions |
How they work together
- PMK Pyro
- Fine grain, very-high acutance, full film speed, compensating contrast. Extraordinary highlight separation with proportional staining.
- Ilford Ilford Delta 100
- Core-Shell crystal technology for extreme sharpness and virtually invisible grain. Clinical and precise look.
- Notes on this pairing
- 70°F (21.1°C). Two inversions every 15 s.