1927 Eastman Kodak Research - Fine Grain Developer

1927 Eastman Kodak Research - Fine Grain Developer

  1. Ian Grant

    Ian Grant Subscriber

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    Ian Grant submitted a new resource:

    1927 Eastman Kodak Research - Fine Grain Developer - 1927 Eastman Kodak Research - Fine Grain Developer

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    Last edited by a moderator: Feb 6, 2016
  2. BradS

    BradS Member

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    interesting. I've used something like this with good results. My thoughts were to put both parts of the Stoekler two bath into one bottle.


    Brad's "something like this" film dev.

    Metol................................2.5g
    Sodium Sulfite..................100g
    Borax.........................3.0 ~ 10.0g
    water to make...................1 liter.

    Use d-76 times as starting points.
     
  3. Richard Wasserman

    Richard Wasserman Member

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    Ian,

    Would this be functionally different from D-76? To my uneducated eye it looks like D-76H. Interesting that it is from 1927.
     
  4. Ian Grant

    Ian Grant Subscriber

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    Kodak's D76h formula is quite different as it's a buffered version of D76 with 15g Boric Acid and Hydroquinoe.

    Haist's version would be better called H76, it isn't a published Kodak formula and is obviously based on this early un-named EK formula and others like D103, DK76 etc. Haist would have been aware of all these variations when he suggested H76 as a Hydroquinone free version of D76.

    It should behave quite similarly to D76/ID-11 when they are useed 1+1.

    Ian
     
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  5. Alan Johnson

    Alan Johnson Subscriber

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  6. Richard Wasserman

    Richard Wasserman Member

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    Thank you!


     
  7. Ian Grant

    Ian Grant Subscriber

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    Alan, the formulae would have been from the same team and both were published around the same time, this one seems to be for stills while D76 (at that point not named) was for Cine films, I have seen a copy of the Kodak piece for D76 from 1927. It's possible they were originally in the same research paper.

    Ian
     
  8. CBG

    CBG Member

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    How does the formula for D103 above relate to the formula I have for Kodak D-103??? I suspect we have one of those one more of those single name/multiple formula train wrecks here.

    What I have for Kodak D-103
    metol . . . . . . . . . . . . . . 2.0 g
    hydroquinone. . . . . . . . . 5.0 g
    sodium sulfite anhyd. . . . 100 g
    borax (decahydrate). . . . 1.0 g
    boric acid (crystalline). . . 15.0 g
    potassium bromide. . . . . . 0.125 g
    water to. . . . . . . . . . . . 1 L
    This is said to be a developer intended for small scale development of variable density sound negatives.
     
  9. Keith Tapscott.

    Keith Tapscott. Member

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    AFAIK, D-76 dates back to 1926.
     
  10. Ian Grant

    Ian Grant Subscriber

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    You're right Keith, but I'd guess so does this formula as it's in secondary souces by may 1927.

    CGB that formulae you give is staed as a variant of D76a/h ( with 2g Borax) by Kodak, it has Hydroquinone, D103 has no Hydroquininone and is indeed a soft working developer for film sound tracks. Unfortunately there are a huge number of errors in US books all due to mistakes in Morgan & Morgan/Photo Lab Index publications. Only manufacturers data can be trusted.

    Ian
     
  11. CBG

    CBG Member

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    Thanks. There are so many errors out there. So, accurate formula, completely wrong identification.
     
  12. Murray Kelly

    Murray Kelly Member

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    Ian, I'm confused.

    Is the original formula 8gr/400gr/8gr/14 fl.oz?

    My converter program leads me to a conversion of 1.25g/65g/1.25g/1L.

    Correct? Not sure why the 2/100/2/1600.
    Thanks for your patience.
    Murray

     
  13. Ian Grant

    Ian Grant Subscriber

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    Murray, I've not converted to the 1 litre volume, rather to a more appropriate comparison with D76, D23, D25, D103 etc based on the 100g/litre Sodium Sulphite but either is valid.

    I've seen D76 published by Kodak as 1g Metol, 50g Sodium Sulphite, 2.5g Hydroquinone, 1g Borax ans Water to 500ml. Sometimes in Patents etc developers seem strange until you find a factor to divide by, then all falls into place and you find perhaps quite a simple variant of a well known formula.

    I prefer to compare developers in a spreadsheet, I'll often compare ratios of principal chemicals, which is why I chose that particular ratio.

    Interestingly this way it's possible to trace how a Wellington & Ward Buffered Borax formula was taken by Kodak and became DK50, there must have been a D50 first, and then this (D50) evolved to D76 but along the way Kodak were experimenting with the ratios of M to Q, leaving the Q out etc, Agfa and Ilford of course have their own variations.

    Ian
     
  14. Murray Kelly

    Murray Kelly Member

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    Ah! OK. I understand. The sulphite is the standard, here. Thanks.
    Murray.