Development time
Ilford Ortho Plus in Ilfotec DD-X
10:30 at 20°C, 1+4 dilution, box speed.
Start timer · 10:30Time
10:30
Standard
Dilution
1+4
Temperature
20°C
Box speed
ISO 80
B&W
Development time
| Dilution | EI | Time | Temp | Agitation | Timer |
|---|---|---|---|---|---|
| 1+4 | 80 | 10:30 | 20°C / 68°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 |
|---|---|---|---|---|---|---|
| 13:08 | 11:46 | 10:30 | 9:27 | 8:24 | 7:34 | 6:50 |
Calculated from the 20°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+4 | 60 ml developer + 240 ml water | 100 ml developer + 400 ml water |
How they work together
- Ilfotec DD-X
- Fine grain, high acutance, full film speed, normal contrast. Full emulsion speed with excellent shadow detail.
- Ilford Ortho Plus
- Orthochromatic film sensitive to blue and green only. Can be handled under red safelight. Reds and oranges render dark.
- Notes on this pairing
- Pictorial contrast (Gbar 0.62).
Ortho Plus in other developers
Other films in Ilfotec DD-X
Ilford HP5 Plus
9:00
1+4 · EI 400 · 20°C · 4 variants
Ilford Delta 3200
9:30
1+4 · EI 3200 · 20°C · 3 variants
Ilford Delta 400
9:30
1+4 · EI 400 · 20°C · 4 variants
Ilford FP4 Plus
10:00
1+4 · EI 125 · 20°C · 2 variants
Harman Technology Kentmere Pan 100
10:30
1+4 · EI 100 · 20°C
Ilford Ilford Delta 100
10:30
1+4 · EI 100 · 20°C · 2 variants
Kodak Double-X 5222
7:00
1+4 · EI 250 · 20°C
Ilford Pan F Plus 50
8:00
1+4 · EI 50 · 20°C
Ilford SFX 200
10:00
1+4 · EI 200 · 20°C
Harman Technology Kentmere Pan 200
9:00
1+4 · EI 200 · 20°C
Adox CHS 100 II
7:00
1+4 · EI 100 · 20°C