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  1. #11
    mts
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    Mine is from the 1960s and works fine. HQ isn't a problem to obtain since it has medical uses and others as well. But PE is right; prices will go up.
    By denying the facts, any paradox can be sustained--Galileo

  2. #12
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    Quote Originally Posted by newcan1 View Post
    Yes PE, they are all dry chemicals except the EDTA can no longer be obtained dry as far as I know. The ones I listed are, I believe, used mainly/only for photography and I am guessing will be extremely expensive in year or two. As for Gerald's comment re: color developing agents' keeping properties, I have to disagree where dry chemicals are concerned: As I indicated I have some 25-yr-old CD4 and I would definitely use it if I had nothing fresher - the only thing holding me back is I would need to develop a couple of test rolls to establish how much I may have to compensate for its age. I used it a year ago with no compensation and got pretty good negatives - maybe slightly underdeveloped, but I never did any testing to quantify. I'd probably add 10%. Twenty five years is probably all I have left!
    EDTA from Artcraft Chemicals.. $16.00/lb.
    http://www.artcraftchemicals.com/pro...ium-part-1130/

  3. #13
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    Ok thats what I was hoping to here... where would one find the formula for C41 to mix from scratch?. I am actually only interested in this application.
    Quote Originally Posted by newcan1 View Post
    yes, I was referring to the dry, raw individual chemicals to make up C41, RA4 or ECN-2 chemistry.

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    Quote Originally Posted by newcan1 View Post
    Finally - anyone know where I can get CD3 and CD4 in larger quantities than 100g or 1/2 LB? I'd like to end up with about 2KG of each of CD3 and CD4.
    Kodak Motion Picture Products Catalog:

    http://motion.kodak.com/motion/uploa...st_15_2012.pdf

    Page 38 has most of what you need for ECN-2 processing in dry powder or concentrate form.

    CD3 in a 25 kilo drum may be a tad more than even you had in mind though :-) Only $757.97!

    Duncan

  5. #15

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    Yes, I saw that price for CD3. 2 kilos at $20 per 100g would be $400 so it would be tempting to buy the drum from Kodak if I could find others to co-invest. But I'm sure we would break all kinds of enviro laws in divvying it up.

  6. #16

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    Quote Originally Posted by Bob Carnie View Post
    Ok thats what I was hoping to here... where would one find the formula for C41 to mix from scratch?. I am actually only interested in this application.
    I use the formula at post #9 of the thread below with very good results:

    http://www.apug.org/forums/forum40/5...-near-c41.html

    That's for the developer. I use an acetic acid stop bath (white vinegar diluted 1:1 works well), several rinses between the stop and the bleach, a ferri bleach (I'm sure you can find a formula here - I use Kodak's published formula for ferricyanide bleach for ECN-2) and conventional fixer.

  7. #17
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    Just remember that the pH cannot be too acidic and you need a stabilizer.

    PE

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    Oh yes - I forgot the stabilizer - formaldehyde and photoflo, I think. PE, which pH were you referring to? The fixer?

  9. #19
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    Thanks- very interesting and helpful.
    Quote Originally Posted by newcan1 View Post
    I use the formula at post #9 of the thread below with very good results:

    http://www.apug.org/forums/forum40/5...-near-c41.html

    That's for the developer. I use an acetic acid stop bath (white vinegar diluted 1:1 works well), several rinses between the stop and the bleach, a ferri bleach (I'm sure you can find a formula here - I use Kodak's published formula for ferricyanide bleach for ECN-2) and conventional fixer.

  10. #20
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    The pH of the tail end process, bleach (or blix), fix and stab should be about 6.0 - 6.7 for best results. The aim would be 6.5.

    I know that the Bleach III from Kodak is more acidic now. That is not a problem as the fix is still higher.

    PE

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