Actually, it doesn't contain a biocide. The final rinse is just KODAK Stabilizer Additive which is 100% POLYOXYETHYLENE 12 TRIDECYL ALCOHOL and a biocide is optional such as Proxel GXL.
I think you might be getting confused with rewash formula which are two separate things which contains sodium sulfite and bi-sulfite.
I'm not getting confused. You are.
I was referring to Kodak ECN-2 / ECP-2D Kit Final Rinse. And that contains a biocide.
Actually all surfactant/tenside compositions I know contain a biocide. The question that arises is whether in a gfinal rinse that is sufficient to protect te emulsion.
Advice to add a biocide is referring to microorganism grow within the tank during continous use, but that is something different
But that's not the final rinse recommended for ECN-2. I laid out in my previous posting, why there is good reason to believe, that ECN-2 process does not necessarily need a biocide.The final rinse offered by Kodak uses as biocide1,2-benzisothiazolin-3.
For the Bellini one I do not know. But benzisothiazolin is common in use with surfactants.
Kodak provides mixing instructions for ECN-2 process chemistry, and in the final rinse a biocide is marked "optional". Kodak sells "Kodak Stabilizer Additive", which contains at most enough biocide to remain stable as a concentrate, and even that's not sure."But that's not the final rinse recommended for ECN-2."
Well, but Kodak only sells this one.
It's right there in the H2407 document on page 7-33:What makes you think "that ECN-2 process does not necessarily need a biocide"?
That's quite a dose of "if" and "may", and therefore a strong indication, that a biocide is not essential ingredient.If biological growth becomes a problem, Proxel GXL may be added at 0.07 mL/L, or Spectrus NX106 at 0.7 mL/L.
Kodak provides mixing instructions for ECN-2 process chemistry, and in the final rinse a biocide is marked "optional". Kodak sells "Kodak Stabilizer Additive", which contains at most enough biocide to remain stable as a concentrate, and even that's not sure.
There must be a reason, why ECN-2 does not, but C-41 and ECP-2 processes do require biocides.
You are correct for ECP-2, its process manual uses the same language as ECN-2 process manual. But Kodak's Flexicolor final rinse for C-41 does have a biocide in it, and it's listed in its MSDS.But as far as I can see they do not necessarily get it either.
Kodak provides mixing instructions for ECN-2 process chemistry, and in the final rinse a biocide is marked "optional". Kodak sells "Kodak Stabilizer Additive", which contains at most enough biocide to remain stable as a concentrate, and even that's not sure.
It's right there in the H2407 document on page 7-33:
That's quite a dose of "if" and "may", and therefore a strong indication, that a biocide is not essential ingredient.
I have been processing in ECN-2 to spec for quite some time and always had a lot of interest around it. I also realize that not everyone can order 30 chemicals to their home and start mixing them.
A few film friends and I started an Indie lab processing ECN-2 rolls and also providing ECN-2 Kits for people who want to process themselves but also don't have the capability to do so.
We all work on the motion side of film and wanted to start a company and give back to the community with a service that isn't really being offered.
Check us out
www.qwdlab.com
https://www.qwdlab.com/ecn2-kitandfilm/
What makes you think "that ECN-2 process does not necessarily need a biocide"?
The fact that there is no biocide listed in the published ECN-2 formulas! Stabilizer additive is only a surfactant..
As I already stated above there is a biocide in all surfactant compositions I I know. But this would be too weak to my understanding to protect the emulsion.
Of course one could add further biocide. But one could also make all the processing baths from scrap, so that is no argument.
great idea!!!
i live in the uk and this would have been a great idea here in England as the large labs wont take a couple 36 rolls of film.
how is the latitude of these films compared to say portra?
Vision3 has the most latitude of any film I have worked with. Portra does have some Vision3 tech within it. I would say, cousins. But because of the printmaking process latitude is needed.
Of course one could add further biocide. But one could also make all the processing baths from scrap, so that is no argument
Can you post some pics when dry? Id love to see that!Well, if Kodak themselves are not including it in their formula, the only way I see is to add it myself, if I decide I need it.
I have just got out of the darkroom. I processed two rolls of Fuji Eterna Vivid 500T and used homebrewed ECN-2 developer. I noticed I’m out of PDTA for the bleach and decided I didn’t want to go through the hassle of mixing fresh fixer, so I went with C-41 bleach, fixer and final rinse. Film is drying and looks great!
Latitude is as good as Portra (the latest 160 and 400 films incorporate Vision3 technology) - if you are looking for an ECN2 lab in the UK, my lab offers this service silverpan.co.ukgreat idea!!!
i live in the uk and this would have been a great idea here in England as the large labs wont take a couple 36 rolls of film.
how is the latitude of these films compared to say portra?
Latitude is as good as Portra (the latest 160 and 400 films incorporate Vision3 technology) - if you are looking for an ECN2 lab in the UK, my lab offers this service silverpan.co.uk
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