DIY/Homemade Caffenol-C-M
Also known as: Caffenol Delta, Caffenol-C Modified
Modified Caffenol formula with potassium bromide restrainer for finer grain. Particularly effective with modern tabular grain films. Development times typically 15-20 minutes.
Temperature
20°C
18–24°C
Dilutions
1
Form
Liquid
Characteristics
Finer grain than standard Caffenol-C, good for enlargement
Dilutions
Standard recipe adds potassium bromide as restrainer: 40g coffee, 16g vitamin C, 54g washing soda, 1g potassium bromide per litre.
Shelf Life
Concentrate
Components store indefinitely separately
Working Solution
Use immediately (30 min max after mixing)
One-shot use only.
Often Used For
Limitations & Warnings
- Requires potassium bromide (sourcing required)
- Longer development times than standard Caffenol-C
- Still produces some staining
Descriptions combine manufacturer specifications with community experience. Subjective assessments reflect common sentiment among photographers and may not match your results.