For 1L of solution | Agfa 8 | Agfa 72 |
Sodium sulfite anhy. | 12.5g | 125g |
Potassium carbonate | 25.0g | 250g |
Glycin | 2.0g | 50g |
Perhaps it’s because the heyday of glycin developers was when emulsions were thicker and developing times were longer in general. Someone might look at that 1941 data and assume that glycin developers must be slow.But one thing I find noticeable is that glycin-only developers are often said to be slow, which is not at all the case here.
Looking at the ORWO Rezepts book from 1971 that I have, it has this developer Agfa/ORWO 72 with the same formula. Development guidance is to dilute 1:3 or 1:4 and develop 5-8 minutes. 1-2 minutes for paper.
Those seem pretty mismatched to the times and dilution you used. That's an odd discrepancy.
I have no experience with glycin developers, personally, and I’ve been hesitant to delve too deeply into them because of all that I’ve read regarding the need to season them. Your first-hand experience makes me rethink my reticence. I shouldn’t necessarily believe everything I read!
The same for 1986 edition of ORWO Formulae
Every photographer has to find its own film EI and right dilution and time for every single new developer. Especially when mixed from the scratch.
Those old recommended dilutions and times are probably from long before the war. I don't think Agfa/ORWO bothered to test those old public recipes with more modern films.
I have the same 1+4 dilution suggested in my 1939 Agfa data book for tray development. I suspect it was for developing plates.I was only remarking that his time was about the same for a dilution that was about 5x ORWO's recommendation.
The stock solution looks murky and heterogeneous, but give it a good shake, dilute, and it's looking normal.
What can you tell about the viscosity of the stock solution, or in other words, how much effort does it take to homogenize the stock solution by shaking it?
Thank you!
Have you ever tried Hubl's Paste? And if so, can you give a short comparison between these two developers regarding viscosity?
But one thing I find noticeable is that glycin-only developers are often said to be slow, which is not at all the case here.
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