Kodak E6 Kit vs Arista E6 kit

Discussion in 'Color: Film, Paper, and Chemistry' started by cdat, Jun 8, 2009.

  1. cdat

    cdat Member

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    I did a search and could not find any info. Any significant differences, (quality, ease of use) between the two kits? I just acquired a Jobo CPE2 and would like to try processing slide film. I've done quite a bit of b&w but never color. Any advice would be greatly appreciated.

    Thanks
    John
     
  2. nworth

    nworth Subscriber

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    The Arista kit is a three solution process using a blix, probably similar to the Tetnal three solution kit. The Kodak kit is a six solution process. PE has noted that blix does not work properly with Ektachrome film. My own experience with the Tetnal kits is that the slides turn out noticeably darker, and some are now showing color shifts after only six or seven years. I would go for the Kodak kit for important or lasting work.
     
  3. domaz

    domaz Member

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    It's a trade-off between quality and time basically. You spend more time mixing with the Kodak E-6 and have to deal with more solutions and steps, but it has better quality and is more reliable. Kodak E-6 is also cheaper per roll than the 3-bath kits. Pretty easy decision if you value your photos.
     
  4. cdat

    cdat Member

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    Quality matters more then time, so the choice is an easy one. Thanks for the information.
    John
     
  5. shootpositive

    shootpositive Member

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    I have a CPE-2 and the Kodak E-6 5L kit... been very happy with the results! Do it! Seeing your personally developed positives is super rewarding
     
  6. stealthman_1

    stealthman_1 Member

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    I have just finished bulk processing the equivalent of 23, 36 exposure, 35mm rolls of E6 with the Arista 1 pint kit, recommended capability, 4, 36 exposure rolls, I plan on running another 10 rolls through it with an additional minute of developer time. The results are as good or better than any professional service I could have gotten at 1/10 or less the price. I am switching to the Kodak 5l however for the sole purpose of any incremental quality increase I will pay for, regardless if I can see it or not, especially if it's just cents a roll tacked onto 50 cents. It is peace of mind. I would not hesitate to use the Arista product again though.
    My evaluation of the Unicolor C41 kit is similar if you exclude the God aweful Stabilizer, which is a disaster in my experience. I could have washed the negatives in sewer water and been better off. I surmise this will work better, I've ordered some Final Rinse to replace the stabilizer/muck they include.
     
  7. BetterSense

    BetterSense Member

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    So you are saying that you basically used the Arista 1-pint kit, for 23 rolls instead of the recommended 4 rolls and saw good quality? You didn't change the time significantly over the 23 rolls?

    It's a lot more economical that way, than for 4 rolls.
     
  8. stealthman_1

    stealthman_1 Member

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    I ended up ramping up the time significantly for the last two batches of 12 4x5 sheets and 2 rolls, to about 9 minutes for the final 2 rolls of 120. The s**nner:surprised: is running as we speak so I'll post some first and last comparisons probably tomorrow. I'll give an actual count of what I processed as well. I am very surprised the chemistry held up the way it did. I processed over 6 days with a Jobo ATL2300.

    On edit so I don't forget. The final count is 20 35mm roll equivalents of 135 and 120, plus 32 4x5 sheets. All, Fuji Velvia 50, 100, Provia 100, 400x, or Kodak 100VS.

    This shot is out the last 12 shot batch of 4x5 on 100VS...
    [​IMG]
    Linky to 1000pixel version
     
    Last edited by a moderator: Jun 14, 2009
  9. EASmithV

    EASmithV Member

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    Please enlighten me!
     
  10. EASmithV

    EASmithV Member

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    Does the Arista kit chemically re-expose?
     
  11. Photo Engineer

    Photo Engineer Subscriber

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    EA;

    With reversal films, 100% of the silver must be bleached and fixed, but in C41 only about 50% of the silver must be bleached. In addition, 1/2 of the E6 silver is a negative image and much of the silver is encapsulated in the developed dye clouds. A blix is weaker than a bleach-fix with few exceptions (cf our patent on this). Therefore it is difficult to blix reversal films and get good dmin and good dye purity.

    If there is no formalin in the process, there is no stabilzation of dyes, and if there is no reversal bath (which there is not with a 3 solution process) then you need a light reexposure for good reversal imaging.

    If the blix is packed as a single part, then shelf life becomes an added issue. See posts on APUG for problems with this.

    PE
     
  12. nworth

    nworth Subscriber

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    As I recall, the Arista kit uses a fogging color developer (a borane, I think), and the blix is mixed from two bottles.
     
  13. EASmithV

    EASmithV Member

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    I just checked the instructions on the Arista E6 kit, and it does not call for light re-exposure.

    Could one extend blix times to try and remove all the silver? Are there any shortcuts/tricks that one could use to circumvent the incomplete silver removal of a 3 solution process?

    So you are saying that while this would work for Ektachrome, it would not have stable/archival colors?
     
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  15. Photo Engineer

    Photo Engineer Subscriber

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    With the use of a borane fogging agent, you can reverse films. Kodak was required to abandon this method due to the acute toxicity of the "TBAB" reversing agent. (Tri-butyl amine borane)

    The TBAB is also not very stable and goes bad quickly after the developer is mixed.

    As for light stability and dark stability, this is still an issue with E6 films which require formalin. C41 films no longer require formalin but the pre-bleach in E6 contains Sodium Formaldehyde Bisulfite adduct, an odorlous compound which decomposes into Formaldehyde and Sodium Bisulfite in the process, and which acts as a stabilzer. See other comments in this thread though.

    As far as I know, extending blix times cannot hurt much, but depending on the quality of the blix, it might help a bit. If this were so, those with problems might try reblixing some of the dark and off color slides to see what happens. Our tests said that that approach was "iffy".

    PE
     
  16. EASmithV

    EASmithV Member

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    Sorry for my questions, I'm sure that they are going to seem a bit ignorant, but that's how we learn, right?

    I really want to try some at home E6 (I looked at the local lab's rate for 4x5 chromes... ouch!), and my wallet likes the fact that I can get the 470ml kit for about 20 bucks from Arista. However, I also want to make sure that process is somewhat archival in the unlikely event that I take a good picture. :tongue:

    Does the TBAB goes bad due to oxidation?

    So no matter what I do, any Ektachrome processed using either a 3 solution process or a 6 solution process is going to be unstable and go screwed in a few years? Would refrigeration of the processed films help to preserve the colors?

    The slides appear darker because they have too much silver remaining, correct?

    Sorry for thread-jacking, but at least it's on-topic...
     
  17. domaz

    domaz Member

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    If you develop with no stablizier your slides will not last long. Kodak Final Rinse does contain an anti-fungual agent but my understanding is that is not enough. The Kodak Pre-bleach contains a chemical that turns to formalin- that is really what is protecting the negatives.
     
  18. EASmithV

    EASmithV Member

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    The Arista kit has no stabilizer? Does that mean the slides processed with it won't last long?
     
  19. Photo Engineer

    Photo Engineer Subscriber

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    TBAB is a powerful reducing agent and not do much good to human biochemistry along the way. It therefore can undergo a series of reactions that lead to unfortunate side results such as incomplete reversal or skin rashes. Even the new E6 reversal bath (Stannous Chloride) is subject to decomposition with time, but is much more friendly to humans and the environment.

    If the Arista kit is 3 solution that means: First Developer, Color Developer, and Blix. I see no place for Stabilzer in there or whatever else can be included for this purpose. If it is absent (IF < please note) then the slides are going to be subject to more rapid fade or discoloring. If the blix is inadequate, then the slides will suffer from a varying degree of retained silver, primarily in highlight areas (MQ silver is harder to blix IIRC) and this will give muddy highlights.

    There can be some loss of sharpness as you see a negative and positive weak silver image overlay each other and these tend to blur detail and increase grain.

    The effects are multifold and will vary from film to film and with the technique of the processor, age of solution and etc... So you may see a predominance of one effect over another. Bad reversal will also enter into this.

    But, quite a few people report good results. So.... IDK. The finer grained, slower films will blix more easily than the faster, coarse grained, high iodide films.

    PE
     
  20. EASmithV

    EASmithV Member

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    If needed, I guess I could go back and rebleach the silver in a better bleach, correct?

    If that is the case, preserving the colors is more of an issue. Is the Kodak E-6 Final Rinse like a stabilizer? Should I get it and use it in addition to the Arista 3 solution kit?
     
  21. Photo Engineer

    Photo Engineer Subscriber

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    You can rebleach provided the dyes will withstand your particular bleach.

    The final rinse contains no formalin AFAIK, and so it does not fully stabilze the E6 dyes. E6 still requires Formaldehyde which is provide in the pre-bleach as noted above. So, you need a formalin bath with Photo Flo 200 to fully protect and rinse the film.

    PE
     
  22. Tom Kershaw

    Tom Kershaw Subscriber

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    PE,

    The AGFA process 44 (E6 equivalent) 7 bath kit I have uses Formalin in the final rinse.

    Tom.
     
  23. EASmithV

    EASmithV Member

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    So, I should get some Kodak pre bleach to use before the blix in the Arista kit, and then make sure to use the photo flo in the final wash? In that case, it still is not using the stabilizer?

    Could I use Kodak Pre-bleach after the Blix? I'm assuming that the stabilizer contains formalin, and so that using pre-bleach after blix is just like using stabilizer?
     
  24. Photo Engineer

    Photo Engineer Subscriber

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    EA;

    Prebleach means PRE. After is AFTER. Got that? Sorry to be emphatic but the English here is rather explicit.

    If you cannot follow those instructions then make a stabilizer of about 10 ml of 37% formalin in regular Photo Flo 200 and use that as a final rinse.

    Tom;

    Agfa follows the original E6 specs before Formalin was banned in final rinses.

    PE
     
  25. stealthman_1

    stealthman_1 Member

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    So I finally finished scanning the last rolls from my 30 roll batch in Arista chemistry. First, I need to correct, I used the 1 quart, not the 1 pint chemistry...my bad. Secondly, the last batches suffer from incomplete development and are about 2 stops underdeveloped in the highlights and 3 to 4 in the mids and shadows. I also found out about Fuji positives needing more time...a little too late, that didn't help. So looking back at the whole result, I wouldn't go much more than doubling the Arista recommendation or 16 rolls from a 1 quart batch.
    This is from the 2nd to the last run. 4x5 on Velvia 50. Fortunately, the Tetons aren't going anywhere...:rolleyes:
    [​IMG]
    Link to 1000 pixel version
     
  26. Tom Kershaw

    Tom Kershaw Subscriber

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    'banned' or removed from the current E6 specification?

    Tom.