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  1. #1
    Michel Hardy-Vallée's Avatar
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    Other HC-110 dilutions?

    What is the purpose of HC-110 dilutions other than A,B, G, and H for film development? It seems nobody lists times for dilutions C to F for any film whatsoever.

  2. #2
    ann
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    try this site
    http://www.covingtoninnovations.com/hc110/

    he covers hc110 pretty well.

  3. #3

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    Good Afternoon, MHV,

    I don't have a definitive answer to your question. I would speculate that dilutions C (1+19), D (1+39), E (1+47), and F (1:79) may have been used with some of the many now-discontinued Kodak films. I did not do a thorough search, but I did find, in a Kodak publication dated 1971, the processing time for Kodak Commercial 4147 copy film in HC-110D. There are possibly additional concrete examples to be found with a little searching. There's also no reason not to use some of these dilutions as you experiment with current films. I have tried, for example, Dilution G (1 + 119) for stand development of T-Max 100.

    Konical

  4. #4
    Ian Grant's Avatar
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    There are a great many permutations for developer dilutions.

    I cant say anything about HC110 as it is rare here in the UK, but Ilfotec HC is the equivalent.

    So Kodak list D76 and other devs at FS, 1+1. and 1+3, I preferred 1+2 so pre computers used graph paper to get a starting point.

    Using Rodinal for nearly 20 years I always found 1:25 far too contrasty prefering 1:50 for most of my negatives. But needing that boost for N+2 negs I settled on 3:100 which is not listed or recommended.

    Now just use a spread sheet to obtain a starting point that will suit your needs.

    To be fair Kodak used to maunufacture a far wider range of filns than their competitors and many films were being used outside their original intended market, ie Tech pan, so they came up with a great all roud developer (HC110) and had to list all the possibilties.

    Ian

  5. #5

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    I use HC-110 1:47 to extend development times a little. I also use 1:94 with reduced agitation for contrasty scenes, though I like the results so much that I might start using it for all development. Right now I'm mainly shooting 35mm Tri-X at EI 250 or 1000, and Agfa 100 at EI 125.

  6. #6
    NikoSperi's Avatar
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    I use E occasionally, although "flavour of the month" is Rodinal... Otherwise, B.
    If you tone it down alot, it almost becomes bearable.

    - Walker Evans on using color

  7. #7
    Marc Leest's Avatar
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    Hello,

    Does anyone, have a development time for
    Neopan 400 (@400)
    APX100 (@100)
    in HC-110 dilution H ?
    TIA,

    Marc.
    We cannot change how the cards are dealt, just how to play the hand...
    Randy Pausch

  8. #8
    Michel Hardy-Vallée's Avatar
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    Thank you all for your insight!

  9. #9
    Rolleijoe's Avatar
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    HC-110

    Quote Originally Posted by mhv
    What is the purpose of HC-110 dilutions other than A,B, G, and H for film development? It seems nobody lists times for dilutions C to F for any film whatsoever.
    After experimenting with dil B for a while, I now stick to 1:51 and dev for 6.5 or 7min @ standard temp/agitation. This works for Neopan400, Tri-X, Acros, and I can easily print on grade 3 paper.

    Rolleijoe

  10. #10
    MikeS's Avatar
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    It's my understanding that some of the 'official' dilutions of HC-110 were designed as DK-50 replacements, one for DK-50 stock, and one for DK50 1:1 but I don't recall off hand which is which.

    -Mike



 

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