Vote: Xtol or Eco Pro LegacyPro Film Developer

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tom williams

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As I have said over in the other threads but not here yet: Our aim was to REDUCE toxidity and not increase it :D. XT-I was a 1:1 clone of Xtol. XT-II was a mix where we reduced the borates but still kept some in (fear-reserve). After thourough testing and hundreds of curves we felt confident enough to come straight with XT-III which has eliminated all borates completely. They are on the CORAP list here in the EU, mostly banned already and the last remaining one (which is in Xtol) is subject to a current investigation. We have to expect this substance to be banned in the very near future. The only downsize of our new buffer is its price. But other than this you can drink it. Captura technology increases safety in handling and helps in dissolving it. Keeping properties are at least the same with a high chance to be better. So in a nutshell XT-3 is the "greenest" version out there of all Xtol based developers.

That is excellent news. Though I know nothing about metals sequestration, I'll be interested to hear your reply to Michael_r's question, and how it relates to environmental toxicity.

In a related thread, antonio_b mentioned "Besides the practical reasons I prefer to buy from Foma or Fotoimpex, they have done a lot of work in order to keep film alive. Fotoimpex was reselling Czech and Yugoslavian film, ie. Foma and Fototeknika (Efke) in the aftermath of reunification, then they bought Adox patents/name from the croats, then relaunched Rodinal when Agfa went down. They have been keeping R&D active.
It's the opposite of Kodak, that as been destroyed by the usual american financial speculation games and lack of cultural interest for small companies
."

Though there are certain notes in that statement that are bound to be disputed, ADOX seems like a very attractive company for the reasons antonio_b stated, in addition to perhaps producing a superior product. XT-III can't get to the local suppliers soon enough to suit me.
 

ADOX Fotoimpex

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How did Fotoimpex choose to deal with metal sequestration in XT-III? Are you using DTPA (as in XTOL) to sequester iron and copper to avoid the Fenton/catalyzed oxidation of ascorbate? Or something else?
That is excellent news. Though I know nothing about metals sequestration, I'll be interested to hear your reply to Michael_r's question, and how it relates to environmental toxicity.
We are using in all ADOX products which have been reformulated in the last three years a biodegradable Komplexer. DTPA has been eliminated/replaced about three years ago in the FX-39 II upgrade programm. As far as I recall it was the best biodegradability/lowest toxidity of all we could find that works similar to DTPA. Thanks for the hint. We can actually point this out in marketing as well ;-)
 
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ADOX Fotoimpex

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Interesting info. I hope it works as well as DTPA though. DTPA is a strong chelating agent for iron and copper and was required in place of more typical sequestering agents in other developers specifically because ascorbate oxidation is greatly accelerated in the presence of these metal impurities, especially iron (which can come not only from water but as an impurity in compounds such as sulfite). I assume you know all of this already so apologies if it is superfluous information. Solving this catalyzed ascorbate decomposition (Fenton reaction) problem without DTPA is a challenge.
I would have to consult with our chemists how they calculated it exactly. As far as I recall the complexing constant is measured against Calcium and then you can calculate the substitution amount. One thing I recall for sure though is that our new complexer had higher binding potential than the one Agfa used in Neutol ECO. So we are somewhat on the safe side and then for sure backed this up by comparison testings.
 

DMJ

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Replying to the original question, sort of. I just received Eco-Pro and developed my first film with it. I also got their fixer. Until now I only used HC110:B with Tri-x 400 so I thought I would give a developer without hydroquinone a try.
I got really nice looking negatives and noted smaller grain and extended midtones, the pictures almost looked as if they were shot with HP5. So I don't know how it compares to the original xtol but this product seems to work great. I used it 1:1.
 

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Radost

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xtol back in stock in freestylephoto
 

m00dawg

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*looks at the empty space in his darkroom where his replacement bags should be*

I'm just a little salty it hit retailers before they send out replacements to folks with bad bags. That's not how they did it last time as I recall.
 
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