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  1. #1

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    processing old colour neg and slide film

    Hello All:I recently aquired a significant quantity of E-4 and C-22 colour slide and neg film.I have heard that E-4 can be processed in E-6 chemistry at the E-4 temperature.Same goes for C-22 in C-41 chemistry.I have a Kodak info sheet that details doing this very process with C-22 in C-41 at the C-22 temperature.

    Anyone try these methods and what were the results?.All film is dated betweenJanuary 1966 and December 1971.

    Thanks,

    Doug

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    I've only done c-22 in Diafine (B&W developer) with good results. I'm not sure if you can really develope E-4 as E-6 or C-22 as C-41, I didn't think it was so in either case because the chemicals just aren't the same.
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    c-22 in c41 - a no no

    I believe that c-41 is hotter than c-22. In c-22's day the gelatine was not as hardened. It might cause the emusion to slide off the base if processed in c-41. Somewhere in my at home notes I have how to adapt home brew chemistry for c-41 to c-22. The one thing I recall is that it is a long process, and I think it was recommended that there was a formalin hardener. Think about putting them on display, and get a deal on drug store sale c-41 film instead, unless you just want to do it to show that you can.

    I can identify with the fiddling just for fun. On the weekend I was working on calibrating D-19 developer time and effective speed for some fine grain positive release film for use as an enlarged negs for afuture alt process print project idea I have in my head.

    I have about 19 sheets of 8x10 and a number of partial sheets. The box has a date of 1977 on it. The asa is now about 1.5, and since it was slow to start with (about 3 asa from the review of literature that I find on it), the speed drop is not too bad, and the fog is not awful unless going for high gammas. In that case you need to toss in some restrainers, and then the effective speed drops even more.

  4. #4

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    processing old colour film

    Hello Mike:Thanks for the advice.I just got off the phone with a former Kodak Tech Rep. I know from my days working at Pro Labs here in T.O.He says as long as you keep the temp.close to or right on the old processes,you won't need a hardener to prevent damage to the emulsions.In the case of C-22 in C-41,there might be either a contrast mismatch or slight colour cast.

    As for E-4 in E-6,he said I'd be taking my chances as he knows of no alternative to processing E-4 in E-6.The film emulsions being so different technology wise he couldn't guarantee that I would get acceptable results.So I guess I'll just shoot a few rolls of each and see what happens.

    Thanks again for your input.

    Doug

  5. #5

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    Quote Originally Posted by spoolman View Post
    Hello All:I recently aquired a significant quantity of E-4 and C-22 colour slide and neg film.I have heard that E-4 can be processed in E-6 chemistry at the E-4 temperature.Same goes for C-22 in C-41 chemistry.I have a Kodak info sheet that details doing this very process with C-22 in C-41 at the C-22 temperature.

    Anyone try these methods and what were the results?.All film is dated betweenJanuary 1966 and December 1971.

    Thanks,

    Doug
    Yes, I have processed E4 False Color IR film in E6 chemistry (at E6 processing temperatures) AFTER Hardening the emulsion with Kodak PREHARDENER SH-5 (Formaldehyde based). The image color was probably adversly affected - but with False Color Film - the results were good enough for my purposes.



    If you would be satisfied with Black and White images, you could develop the film in a Phenidone based B/W film developer (like TMax or DDX).
    Last edited by Tom Hoskinson; 04-22-2008 at 03:36 PM. Click to view previous post history. Reason: left something out
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  6. #6
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    Processing the old films in the new processes even at lower temperature can be iffy at best.

    The C41 process uses a new developing agent and no benzyl alcohol, and the E6 process uses a new first developer and no benzyl alcohol in the color developer.

    This can yield some strange results, but since the film is so old, you may never be able to tell which is worse, the film or the process.

    PE

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    processing old colour film

    Hello Tom:Thanks for your input.Regarding processing these films as B&W,what woulsd you recommend as a starting point for film asa,developer time and temp?.

    Thanks,

    Doug

  8. #8

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    processing old colour film

    Hello Ron:Thanks for your input.I'll be taking Tom's suggestion to process a roll of each as B&W.Also I found hidden in one of the boxes of 828 film 8 rolls of Kodachrome II film.I understand that the Kodachrome process starts out with a B&W type first developer and then the different dye developers and colour re-exposures take place.Any recommendations on processing this film as B&W?.
    If so,what problems would I encounter trying to remove the rem jet coating?.

    Thanks,

    Doug

  9. #9
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    I have no suggestions for development of the films, but I can say that rem jet removal is a mess, a pain, and can ruin the developer for further use.

    We dipped the film into carbonate solution for a few minutes and then using a folded wet sponge wiped the front and back of the film at the same time. This was pretty effective. Then we washed the film in running water to remove any residual rem jet.

    PE

  10. #10

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    old colour film processed as B&W

    Hello Ron:Thanks for the info.Would a presoak in water facilitate the removal of the remjet coating?.If not,what would be the concentration of the carbonate solution and at what temp.would it be used?.Does it matter what type of carbonate?.I'm assuming you are refering to sodium carbonate.

    Thanks,

    Doug

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