RD-201: Phenidone-Pyrogallol true two bath
Phenidone with pyrogallol is superadditive and allow to make true two bath developer. Bath A have low acidic pH and developing start only in bath B. Developer increase speed by 1 stop and produce very sharp images.
Sodium sulfite 50g
Sodium metabisulfite 6g
Sodium sulfite 30g
Sodium carbonate 15g
Developing time 3min in each bath.
Polypan F50 @64