Suprol - Reversal processing
Nick, there is or rather was a very informative technical data sheet for May & Baker Suprol. May & Baker became Champion.
The data sheet was published in the 1970's and gave a lot of extremely useful and detailed information on a wide range of uses for Suprol, and this included reversal processing and adjustments to obtain different gammas etc.
Other uses were as a fine grain developer for commercial processing, and at about 1+29 or higher dilution for tank development, and it did give very fine grained negative.
Suprol is fairly similar, effectively equivalent, to Ifords PQ Universal and so would give you pointers for adjusting and using a developer like ID-62, or even ID-72
My copy of the datasheet is in storage but if you can't find a copy I'll try and dig it out next time I'm in the UK.
Sodium Carbonate Vs Poassium Carbonate
Reviving this thread with a related question....
I noticed the recipe attached to this thread includes a "Agfa 80" recipe. The main difference between the D-19 and Agfa 80 is that Potassium Carbonate replaces Sodium Carbonate in the Agfa 80.
I was just wondering what the effect of this may be?
I'm asking as I was about to mix my own D-19 when I realised I was low on Sodium Carbonate but had plenty of Potassium Carbonate.