This PC-Sulfite formula is so simple that somebody had to have already thought of it. Well, that somebody turns out to be Peter Svensson who posted a similar formula in 2006 here in this thread. Here's his one liter formula:


Sodium sulfite ................ 64 g
Phenidone ..................... 0.08 g
Ascorbic acid ................. 3 g
For comparison, I've quoted my formula below:

Quote Originally Posted by albada View Post
Sodium sulfite ................ 90 g
Phenidone ..................... 0.15 g
Ascorbic acid ................. 2.8 g

Target pH = 8.2 (same as XTOL). Add 15% to XTOL's time as a starting-point.
Given that Peter's formula has less alkali and more acid than PC-Sulfite, plus less phenidone, you should expect his formula to have a lower pH with considerably longer dev-times, and perhaps finer grain as well. Anyway, I just stumbled across his formula and wanted to give credit where credit is due.

Mark Overton