michael-kielgmxnet
Hello everyone,
I’m looking for a data sheet for Adox Pan 25, mainly for details such as the gradient-time curves for development and its Black-Schmidt behaviour. I haven’t been able to find one anywhere so far. Could anyone here perhaps help me out?
And I’ve got another question about the development of this film: is there a recommended development time for Adox ATM49 (or the newer Atomal)? So far, I’ve only found times for developers like D76 or Rodinal.
Best regards,
Michael
KlausWehner
Hi Michael,
I’ve looked into Adox 25 in great detail. I consider it an absolutely excellent film with exceptional performance (and a few minor weaknesses). It’s a real shame that it isn’t available as roll film!
For development, I use a special developer based on my own formula. This ensures I achieve the rated sensitivity of 15 DIN, avoid excessive contrast, and obtain beautifully modulated grey tones.
If you’re interested, I might be able to send you a batch to test.
Incidentally, this developer also produces very good results with Foma T 200, which is otherwise very difficult to develop.
I identified the Schwarzschild effect – though back in August 2006 – when the film still had a different name. However, I am certain that the values can be applied to the current emulsion.
Measured time (sec.) 1 / 2 / 4 / 8 / 15 / 30 / 60
Corrected time (sec.) 1.5 /4.5 /12 / 34 /`100 / 315 / 860
And finally, this film is ideal as a black and white transparency film in my ‘Wehner reversal process’. I have just started a project photographing 8x10-inch slides (studio portraits). Fortunately, Adox 25 is available as sheet film in that format!
Warm regards from Paderborn
Klaus
michael-kielgmxnet
Hi Klaus,
Thank you very much for your offer regarding the homemade developer. However, I’m not really one for mixing my own solutions, so I prefer to use ready-made developer. So far, I’ve had my first experiences with Adox Pan 25 in Rodinal 1+100. I simply like the “look” of classic low-speed films in Rodinal. Your figures on the Schwarzschild effect are certainly helpful to me, thank you very much!
Best regards from the snow-covered Untertaunus,
Michael
KlausWehner
Hi Michael,
My developer wouldn’t be (much) more complicated than Rodinal. Just perform dilution with water – that’s it. The difference is that it comes in two parts (for a longer shelf life). In theory, you could combine the two parts.
But I can well understand your preference for Rodinal. I used to enjoy working with it a lot myself. I can well imagine that Rodinal also works well with the ADOX 25.
Good luck and warm regards from Paderborn!
Klaus
Gerd
I get the impression that you’re talking at cross purposes.
Michael is referring to the Adox PAN 25, whereas Klaus is obviously talking about the ADOX CHS 25, as the PAN wasn’t available in 2006. Was it?
Unfortunately, I can’t add anything to the original question.
Gerd
KlausWehner
Hello Gerd,
Thank you for pointing that out.
My mistake! I didn’t actually express myself quite correctly – but I was indeed referring to the Adox Pan 25 as well.
The reason for my inaccuracy: in my day-to-day lab work, the Adox Pan 25 is referred to internally as ‘A25’ (though ‘AP25’ would probably be better).
The Adox Pan 25 didn’t exist back in 2006 – but it did have an (almost) identical predecessor, which was marketed by a different company – though, of course, under a different name.
All clear?
Best regards from Paderborn
Klaus
Gerd
Thanks for clarifying that.
I seem to have misinterpreted the phrase ‘when the film still had a different name’. After all, the ADOX CHS can also be bought under a different name.
Gerd
KlausWehner
Hello everyone,
That’s right, the CHS used to have a different name too. Before that, it had yet another name – and was called…
Adox!
But a word about the A49. It’s actually a fine grain developer.
Special measures for a fine grain are really not necessary with Adox Pan 25. The emulsion is already very fine-grained by nature. In that respect, Rodinal seems to me to be the more logical choice.
However, I also have some fundamental reservations about the A49. The developing agent used belongs to a somewhat problematic class of substances. Para-phenylene and its derivatives are, in some cases, quite toxic and should only be used when there are no alternatives. In this case, there are good alternatives.
(My personal assessment)
Warm regards from Paderborn
Klaus
michael-kielgmxnet
Hello Klaus,
I know that A49 isn’t exactly harmless in terms of its composition. I still like to use it from time to time, especially when dealing with difficult contrasts. Since FOTOIMPEX’s development service also uses this developer, I was hoping to get some development tips from the forum host.
I’ve also successfully developed the alleged predecessor to this film, the Orwo NP15, in A49. So I suspect that the ADOX works well in this developer too. But I think Rodinal will remain my standard developer for this film, if only for the sharpness it produces.
Best regards,
Michael
KlausWehner
Hello Michael,
Unfortunately, para-phenylene derivatives also have a limited shelf life. You should bear this in mind once you’ve prepared the A49: use it up as quickly as possible!
In my experience so far, the most consistent results can be achieved by using the solution as a single-use developer.
But as an experienced A49 user, I probably don’t need to tell you that, do I?
You’ll probably have to test the correct development time yourself.
Best regards from Paderborn
Klaus
StefanCaspari
Hello everyone,
I’m looking for a technical data sheet for Adox Pan 25, particularly for details such as the gradient-time curves for development and its Black-Schmidt behaviour. So far, I haven’t been able to find one anywhere. Could anyone here perhaps help me out?
And I’ve got another question about developing this film: is there a recommended development time for Adox ATM49 (or, more recently, Atomal)? So far, I’ve only found times for developers like D76 or Rodinal.
Best regards,
Michael
Hello Michael!
I’ve just developed some sheet film negatives on ADOX Pan 25 that I shot back in September(!). It’s safe to assume that freshly exposed and developed Pan 25 will react differently.
Nevertheless, here’s my tip: I developed in Ultrafin liquid at 1:30, slow rotation, 3 mins 30 sec. Pre-rinse is essential with these times.
Speed at 13 DIN.
Incidentally, I get the impression that this film is similar to the old Agfapan 25.
I’ll now test it again with freshly exposed film.
Best regards: Stefan
michael-kielgmxnet
Hello Michael!
I’ve now developed some sheet film negatives on ADOX Pan 25 that I took back in September(!). It’s safe to assume that freshly exposed and developed Pan 25 reacts differently.
Nevertheless, here’s my tip: I developed in Ultrafin liquid at 1:30, slow rotation, 3 mins 30 sec. Forward motion is essential at these times.
Speed at 13 DIN.
Incidentally, I get the impression that this film is similar to the old Agfapan 25.
I’ll now test it again with freshly exposed film.
Best regards: Stefan
Hello Stefan,
Thank you very much for the information. I’ve heard – or rather read – that the ADOX Pan 25 is supposed to be an improved successor to the old Orwo NP15 and is also produced in Wolfen by Filmotec. But the NP15 and the APX 25 probably weren’t that different from each other to begin with... I just don’t understand why such a secret is being made of this film and why there appears to be no detailed product information. Surely a film being launched on the market should have been tested with the most commonly used developers.
