Grain

Discussion in 'The Darkroom' started by oriecat, Jun 29, 2004.

  1. oriecat

    oriecat work in progress

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    What are all of the factors that affect the grain of a negative?

    Last Friday I shot a 10 shot roll (my first bulk loaded roll!) of HP5+ 400 iso. Shot outdoors in early evening, sunny day, still loads of light. I used all auto exposure, due to shooting my nephew (2 year old on the go, needed to be quick!) Developed in Rodinal for 6 minutes. Might have been a little over zealous on the agitation.

    The skin tones are all much grainier than I think I have ever noticed my HP5 to be. Clearly noticeable even just looking at the negs in the loupe. The dark tones look fine.

    I am just wondering if something I did may have caused it (such as the agitation, or using Rodinal with HP5 (which I don't think I've done before)), or if it's the product of all the factors combined, or maybe the roll of film I got is just grainy, or what...
     
  2. Soulreaver

    Soulreaver TPF Noob!

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    Time and dillution affect the size of the grain.
    If you overdevelop a neg you'll get bigger grain.
    That could happen with a higher temp too.
    More dilluted solutions and more time give you a finer grain.

    Since you bulk loaded ( congrats!) did you set the iso manually?

    Mmmm, just read you can see the grain in the neg...
    Thats quite a big grain :shock: :lol: .Must be something else...
    If you agitate too much you can cause uneven development, or somehow getting the chemicals between the layers of the film.

    And thats all I know ( if I got i right :wink: )
     
  3. oriecat

    oriecat work in progress

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    Thanks for your thoughts! :) I used the Rodinal at 1+25. Maybe next time I will try the 1+50 times and see how that looks.

    I bought dx-coded canisters, so the cam should have set it to 400 automatically.
     
  4. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    Rodinal tends to produce grainier results than say D76 or ID11.

    All of the following tend to increase grain size:
    More concentrated developer
    Higher dev temp
    Greater agitation
    Increased development times
    Overexposure
     
  5. oriecat

    oriecat work in progress

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    Thanks Matt! :)
     

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how undre and overexposure affects the grain of a negative in film photography