Development time
Ilford Delta 400 in PMK Pyro
12:00 at 21°C, 1+2+100 dilution, EI 320 (−⅓ stop).
Start timer · 12:00Time
12:00
Standard
Dilution
1+2+100
Temperature
21°C
Box speed
ISO 400
B&W
Development time
| Dilution | EI | Time | Temp | Agitation | Timer |
|---|---|---|---|---|---|
| 1+2+100 | 320−⅓ stop | 12:00 | 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 |
|---|---|---|---|---|---|---|
| 16:40 | 14:56 | 13:20 | 12:00 | 10:40 | 9:36 | 8:40 |
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 Delta 400
- Modern T-grain film with fine grain and high sharpness. Core-shell crystal technology provides excellent detail. More contrast than HP5 with less pushability.
- Notes on this pairing
- Sheet gives EI 260-320. 70°F (21.1°C). Two inversions every 15 s.
Delta 400 in other developers
510-Pyro
22:00
1+100 · EI 400 · 20°C · 2 variants
D-76
9:30
Stock · EI 400 · 20°C · 2 variants
HC-110
7:30
B (1+31) · EI 400 · 20°C · 3 variants
ID-11
9:30
Stock · EI 400 · 20°C · 6 variants
Ilfotec DD-X
9:30
1+4 · EI 400 · 20°C · 4 variants
Microphen
6:30
Stock · EI 400 · 20°C · 5 variants
Rodinal
9:00
1+25 · EI 400 · 20°C · 2 variants
XTOL
7:30
Stock · EI 400 · 20°C · 5 variants