Caffenol formulas
These are the Caffenol formulas I’m currently using for both film and paper developing. The ingredients should be dissolved one at a time in half the final volume of water, then the remainder of water added.
Film:
| Reagent | g per liter |
|---|---|
| Na2CO3 | 54g |
| Ascorbic Acid (Vitamin C) | 16g |
| KBr (for 400 speed films or higher) | 1g |
| Instant coffee | 40g |
Process: 15m development at 68F.
Paper (mostly Harman Direct Positive):
| Reagent | g per liter |
|---|---|
| Na2CO3 | 80g |
| Ascorbic Acid | 4g |
| Instant coffee | 40g |
Process: 2-5m in developer, 30 seconds water stop bath, 60 seconds in paper fixer, wash 3x, 2m Permawash, 3x wash (5m each; sometimes I have to soak them longer to get the pink/brown staining out).
Also, this PDF is a useful thing to keep handy: