Developer · Black and white
DIY/Homemade Parodinal
AvailableB&WLiquid Concentrate
Also known as: Paracetamol Rodinal, Acetaminophen Developer
Rodinal substitute from paracetamol (acetaminophen). Formula from the source: 3 g paracetamol (six 500 mg tablets, crushed), 4 g sodium hydroxide and 10 g anhydrous sodium sulfite in 50 ml of water. The paracetamol converts to p-aminophenol in the strong hydroxide. Dilute 1:39 and use times for Rodinal 1:25.
- Type
- Liquid
- Process
- B&W
- Temperature
- 20°C
- Dilutions
- 1
- Shelf life
- Not stated by the source
18–24°C (64–75°F)
concentrate
Dilutions
| Ratio | Use | Notes |
|---|---|---|
| 1:39 | One-shot | As the source writes it: dilute 1:39 and use like published times for Rodinal 1:25. The source does not say whether 1:39 means 1+39. |
Shelf life
- Concentrate
- Not stated by the source
- Working Solution
- Not stated by the source
One-shot use only.
Often used for
A Rodinal substitute (the source says it is reputed to give similar results)
Limitations & warnings
- Made with sodium hydroxide (caustic)
- Results reputed, not verified, to match Rodinal
Descriptions combine manufacturer specifications with community experience. Subjective assessments reflect common sentiment among photographers and may not match your results.