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I mixed 1.25 liters stock and then diluted it to 2.5 liters. My first roll came out perfect at 13 minutes so I did 3 more rolls in the same developer and they also came out perfect so I did 4 more rolls in the same developer but added a minute of time and they also all were perfect and matched the previous rolls density.
But I guess in Glasgow or Montreal you aren't accustomed to extreme contrast range challenges. .
The trouble with D-76, which is a very good developer, is that some components are a carcinogene health risk.
So the alternative is Chris Patton's E-76 Ascorbic-Phenidone based formula.
It works identically like the classic D-76 but is more health friendly.
But I often mix my own D-23. Should I let it stand a week like the above advice for D-76?
reusing D-76 1:1 and is it recommended?
In the quantities used, the Borax is more of a known environmental/ personal risk than any of the other ingredients.
And a to get a meaningful ascorbate based developer with any lifespan, it needs much more serious iron sequestration than E-76 gives.
By the time you have resolved these problems, you're most of the way to Xtol/ XT-3 anyway.
Did you wait the mandated 24 hours (or whatever) before developing the first roll? I'm asking because I monitored pH for 3 days after mixing Kodak D-76 (the official stuff in a yellow package) and saw no change +/-0.02. When I posted that finding, challenging common wisdom, someone retorted like it's not just the pH, there are complex reactions affecting activity...I guess I should update since I started this thread. I mixed 1.25 liters stock and then diluted it to 2.5 liters. My first roll came out perfect at 13 minutes so I did 3 more rolls in the same developer and they also came out perfect so I did 4 more rolls in the same developer but added a minute of time and they also all were perfect and matched the previous rolls density. When I contacted the 8 rolls they all needed the same time and contrast setting, which was my standard normal contrast. I was very impressed as was the client. I am now going to do some testing and see about making it my go to developer for personal work. That will include 8x10, 4x5, 120 and 35mm.
And in ADOX XT-3 even the Borax is replaced by an environmentally and health friendly substance.
And in ADOX XT-3 even the Borax is replaced by an environmentally and health friendly substance.
Any idea what this "environmentally and health friendly substance" is? Is it a Carbonate-Bicarbonate buffer? The recently introduced Tetenal Parvofin tablet developer, which is "free of boron compounds", uses this buffer.
Trilon-C.
It looks like it could be potentially used to replace metaborate in many developers - at least for single shot use.
Did you wait the mandated 24 hours (or whatever) before developing the first roll? I'm asking because I monitored pH for 3 days after mixing Kodak D-76 (the official stuff in a yellow package) and saw no change +/-0.02. When I posted that finding, challenging common wisdom, someone retorted like it's not just the pH, there are complex reactions affecting activity...
I also second the question by Raghu Kuvempunagar about re-use of 1+1 dilution.
Thanks. Is it both an accelerator and a chelating agent?
No I waited only a couple hours with the container tightly closed. I then processed 1 roll which might have seasoned it some.Did you wait the mandated 24 hours (or whatever) before developing the first roll? I'm asking because I monitored pH for 3 days after mixing Kodak D-76 (the official stuff in a yellow package) and saw no change +/-0.02. When I posted that finding, challenging common wisdom, someone retorted like it's not just the pH, there are complex reactions affecting activity...
I also second the question by Raghu Kuvempunagar about re-use of 1+1 dilution.
... D76 [in university]. The idea of waiting was never addressed or mentioned or observed.
No I waited only a couple hours with the container tightly closed. I then processed 1 roll which might have seasoned it some.
In the 1970s I was in photography school and the only film developer they wanted us to use was D76. The idea of waiting was never addressed or mentioned or observed.
D-76 1:1 1-shot is very reliable. Grain is a bit crisper, but not more prominent; I hate 'oatmeal' grain. I guess all oatmeal is made from grain, though.
It’s actually Trilon M (MGDA) that they seem to be using as part of their environmentally friendly proprietary buffer - maybe.
DTPA (which I just realized is sometimes called Trilon C) is still present in XT-3 to deal with Fenton (same as XTOL). Hard to get around using DTPA in ascorbate developers, and standard EDTA is generally a more powerful complexing agent than Trilon M even for calcium, magnesium etc.
this will do fine; horizontal (rotation)-processing; one-shot is just more economical and consistent than messing with replenisher.Great! Thank you people. The first roll is in the fix. I will look at it soon. I went 1-1 68º for 13 minutes. I process in total darkness in a vertical tank which holds up to 5 liters developer and I put enough in to easily cover.
In the quantities used, the Borax is more of a known environmental/ personal risk than any of the other ingredients.
And a to get a meaningful ascorbate based developer with any lifespan, it needs much more serious iron sequestration than E-76 gives.
By the time you have resolved these problems, you're most of the way to Xtol/ XT-3 anyway.
No. And D-76 largely reaches equilibrium in 48hrs - it seems to relate to the formation of HQMS etc.
No. If you want to replenish a diluted developer you are really better off looking at DK-60a or DK-50 (their 1+1 dilutions seem to be where HC-110's Dilution B and Dilution D were aimed at respectively substituting for).
To my humble opinion, the Hydroquinone is the culprit ... [link to who document]
[Edited to correct error] Trilon-M.
It looks like it could be potentially used to replace metaborate in many developers - at least for single shot use.
To my humble opinion, the Hydroquinone is the culprit: http://www.inchem.org/documents/hsg/hsg/hsg101.htm
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