Developer · Black and white
Harman/Ilford Ilfotec DD-X
AvailableB&WLiquid Concentrate
Also known as: DD-X
Liquid concentrate for fine grain at full film speed. Ilford recommends it for its Delta films and says it also works well with other makers' black and white films.
- Type
- Liquid
- Process
- B&W
- Temperature
- 20°C
- Dilutions
- 2
- Capacity
- 10
- Shelf life
- 24 months in full tightly capped bottles (4 months half full)
20–24°C (68–75°F)
rolls per litre
concentrate
Characteristics
GrainFine, level 1 of 3
AcutanceHigh, level 3 of 3
ContrastNormal, level 2 of 4
Full emulsion speed with excellent shadow detail
Dilutions
| Ratio | Use | Notes |
|---|---|---|
| 1+4 | One-shot | Ilford's dilution; one-shot gives the highest image quality. Can be reused for economy with slightly reduced quality. |
| 1+9 | One-shot | Community dilution, not in Ilford's datasheet. Times from user reports. |
Shelf life
- Concentrate
- 24 months in full tightly capped bottles (4 months half full)
- Working Solution
- No more than 24 hours
Ilford: 1 litre of 1+4 working solution can process up to 10 films if reused, with 10% more time per film. One-shot, a 1 litre bottle of concentrate develops 16 films; with reuse up to 50.
Development times
| Film | Dilution | ISO | Time | Temp |
|---|---|---|---|---|
| HP5 Plus | 1+4 | 400 | 9m | 20°C (68°F) |
| HP5 Plus | 1+4 | 800 | 10m | 20°C (68°F) |
| HP5 Plus | 1+4 | 1600 | 13m | 20°C (68°F) |
| HP5 Plus | 1+4 | 3200 | 20m | 20°C (68°F) |
| FP4 Plus | 1+4 | 125 | 10m | 20°C (68°F) |
| Delta 3200 | 1+4 | 3200 | 9m 30s | 20°C (68°F) |
| Delta 3200 | 1+4 | 1600 | 8m | 20°C (68°F) |
| Delta 3200 | 1+4 | 6400 | 12m 30s | 20°C (68°F) |
| Ilford Delta 100 | 1+4 | 100 | 10m 30s | 20°C (68°F) |
| Pan F Plus 50 | 1+4 | 50 | 8m | 20°C (68°F) |
Showing 10 of 53 entries.
Full guides for Ilfotec DD-X
Often used for
Delta 3200 (particularly recommended by Ilford)Push processing fast films (HP5 Plus, Delta 400, Delta 3200, SFX200)Fine grain with full film speed
Limitations & warnings
- Reusing the developer lowers image quality slightly (Ilford recommends one-shot)
- Ilford does not recommend push processing with reused developer
Descriptions combine manufacturer specifications with community experience. Subjective assessments reflect common sentiment among photographers and may not match your results.