I use the Kodak E6 Single Use Chemistry Kit for processing Ektachrome 35mm to 5"x7" sheet film and have found it easy to use and almost foolproof is you follow the Kodak instructions. I have attacthed a link to the Kodak site if you haven't already checked it. For sinlge shot use sometimes it is adviseable to decant the developers and replenisher into smaller bottles to reduce oxidation or putting an inert gas into the bottles to displace the oxygen in the bottles to extend the shelf life. Kodak recommends that you use the kit within two years of the production date on the bottles. The most imprtant thing I have found with E6 processing is being able to keep the temperature as close to Kodaks recommended times as possible - especially for the developers.
My experience has been that the stock solutions in the Kodak six bath kit last a very long time after being opened - at least six months, probably longer. The mixed solutions last a pretty long time too - weeks.
As for comparing three bath to six bath kits, I have noticed that the Tetnal three bath kit produces a bit more dense transparencies than the Kodak six bath kit. That may be due to the blix. Otherwise, the results seem comparable. There may be some stability issues that make the six bath kit better, however. It is worth noting that the Tetnal kits use a formaldehyde type stabilizer.
Can you tell me what the consequences of a formaldehyde type stabilizer is, please?
Originally Posted by nworth
This has been posted so many times, I'm getting tired of writing it down. Please do a search on it and save me and all of the other people the time.
I checked the book I quoted yesterday again today. I am afraid the author makes no mention of shelf life. He was a professional with his own processing facility so with his usage shelf life was probably never an issue.Most kits will carry leaflets which I'd expect mention shelf life. I suspect that most kits' leaflets will quote similar shelf life. The one thing I know of,that you can do to ensure maximum life which may extend the quoted shelf is to cover the chemicals with a protective gas which excludes air. Tetenal Protectan is one such gas. The colour expert at Nova Darkroom believes in it but there may be others on this site who will advance the opposite view.
Originally Posted by greypilgrim
The problem with film developer is that if it has lost its potency then it is too late when you view the film and a whole roll is at best developed to an inferior standard.
With Ilfochrome printing taking a chance is less risky as at worst the deteriorating quality affects one print and can then be thrown away.
I'd mark all chemicals in kits with a first used date. Unless you are using kits at a speed where you can be sure of using the whole kit so quickly that it doesn't matter then it is easy to forget dates.
Try APUG's search engine as photo engineer has suggested. You're unlikely to find a ready packaged answer in any one thread/post but will gain knowledge.
APUG has discussed the possibility of a forum to gets condensed, concise answers to cover some frequently discussed items. Very useful to newcomers and probably in fact to most of us, if truth were told. Unfortunately it is easier said than done.
Just give it a go and best of luck. You can always give us your findings afterwards in terms of what was easy/hard. You'll usually get other members' comments on your scans in the Critique Gallery or in the threads by attaching a thumbnail.
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If you scroll past the "Quick Reply" box you can find a short list of potentially related threads.
Sorry about the redundant question. I did a search on the topic of my original question, but didn't think here. I'm off to search the archives.
Originally Posted by Photo Engineer