Quote Originally Posted by Rafal Lukawiecki View Post
Mark, now that you have done your fairly involved development work on an XTol-like concentrate, have you any feelings as to what would be the closest-or-better, regular, non-concentrated version, ready for an immediate use, after mixing?
Rafal, a simple method would be to mix the formula for 214D directly into water, without the propylene glycol. That would be:

Water ........................................ 800 ml
Sodium sulfite ........................... 45 g
Sodium metaborate 4 mol ........ 1.8 g
Ascorbic acid ............................ 4.2 g
Dimezone S .............................. 0.08 g
Water to .................................... 1 litre

Propylene glycol changes dev-time a little, so removing it means you would need to adjust time. But the big problem with all PC formulas like this is that the Fenton reaction slowly destroys the ascorbate. That means it will last only a few weeks. Kodak solved that problem by adding DTPA to XTOL. But DTPA is difficult to find for ordinary people. Another way to fix this problem is to not put ascorbic acid in it, giving this formula:

Water ........................................ 800 ml
Sodium sulfite ........................... 45 g
Sodium metaborate 4 mol ........ 1.8 g
Dimezone S .............................. 0.08 g
Water to .................................... 1 litre

This solution will probably last a long time, at least 6 months. But to use this developer, you need to add ascorbic acid separately to your beaker. That's an extra step, so it's not quite "ready to use" which you asked for. If you don't want to weigh the ascorbic acid, it might be easy to measure it with a small measuring spoon.

Back in July 2012, I found that this formula gave the same development-times and same quality as XTOL:

Water ........................................ 800 ml
Sodium sulfite ........................... 90 g
Sodium metaborate 4 mol ........ 6.7 g
Ascorbic acid ............................ 8.5 g
Dimezone S .............................. 0.2 g
Water to .................................... 1 litre

This acted like a clone of XTOL. It was mixed in propylene glycol, so direct-to-water times might change. It's problem was crystallization, so it's not suitable for propylene glycol. But you can also add the ascorbic acid separately with this formula.

Finally, ascorbic acid can be replaced with hydroquinone and sodium metabisulfite. That gives you a long-lasting PQ developer, and there are several good PQ formulas around if you want to try that method. But in those formulas, I suggest replacing Phenidone with 1.3 times as much Dimezone S.

Good luck,

Mark