B&WLiquid Concentrate
Harman/Ilford Ilfotec DD-X
Also known as: DD-X
Liquid concentrate with excellent keeping properties. Popular XTOL alternative. Recommended by Ilford for Delta and other modern films.
Temperature
20°C
18–24°C
Dilutions
2
Form
Liquid
Characteristics
Grainfine
Acutancehigh
Contrastnormal
Full emulsion speed with excellent shadow detail
Dilutions
1+4One-shot
Standard dilution. Most published times.
1+9One-shot
Economy dilution, longer times.
Shelf Life
Concentrate
2 years unopened
Working Solution
Use immediately (one-shot)
One-shot use only
Development Times
| Film | Dilution | ISO | Time | Temp |
|---|---|---|---|---|
| HP5 Plus | 1+4 | 400 | 9m | 20°C |
| HP5 Plus | 1+4 | 800 | 10m | 20°C |
| HP5 Plus | 1+4 | 1600 | 13m | 20°C |
| HP5 Plus | 1+4 | 3200 | 20m | 20°C |
| FP4 Plus | 1+4 | 125 | 10m | 20°C |
| Delta 3200 | 1+4 | 3200 | 9m 30s | 20°C |
| Delta 3200 | 1+4 | 1600 | 8m | 20°C |
| Delta 3200 | 1+4 | 6400 | 12m 30s | 20°C |
| Ilford Delta 100 | 1+4 | 100 | 10m 30s | 20°C |
| Pan F Plus 50 | 1+4 | 50 | 8m | 20°C |
Often Used For
T-grain films (T-Max, Delta)Push processingFine grain with full speed
Limitations & Warnings
- More expensive per roll than powder developers
Descriptions combine manufacturer specifications with community experience. Subjective assessments reflect common sentiment among photographers and may not match your results.
Last verified: Jan 2026Report an error