Development time
CatLABS CatLABS X Film 320 (120/Sheet) in Ilfotec DD-X
13:00 at 20°C, 1+4 dilution, box speed.
Start timer · 13:00Time
13:00
Standard
Dilution
1+4
Temperature
20°C
Box speed
ISO 320
B&W
All 2 times
| Dilution | EI | Time | Temp | Agitation | Timer |
|---|---|---|---|---|---|
| 1+4 | 320 | 13:00 | 20°C / 68°F | Standard | Start timer |
| 1+4 | 200−⅔ stop | 8:00 | 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 |
|---|---|---|---|---|---|---|
| 16:15 | 14:34 | 13:00 | 11:42 | 10:24 | 9:22 | 8:27 |
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.
- CatLABS CatLABS X Film 320 (120/Sheet)
- Different emulsion from the 35mm version (which is Kodak Double-X). Origin unclear - likely aerographic stock with finer grain.
- Notes on this pairing
- Finer grain, more exposure latitude.
CatLABS X Film 320 (120/Sheet) in other developers
Other films in Ilfotec DD-X
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Ilford Pan F Plus 50
8:00
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10:30
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10:00
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Harman Technology Kentmere Pan 200
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Adox CHS 100 II
7:00
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CatLABS CatLABS X Film 320 (35mm)
10:00
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Street Candy Street Candy MTN 100
10:00
1+9 · EI 100 · 20°C · 2 variants