What they will achieve...

Discussion in 'B&W: Film, Paper, Chemistry' started by baachitraka, Jul 13, 2011.

  1. baachitraka

    baachitraka Subscriber

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    I was looking some photos in flickr on yesterday, on description it said they used diluted developer and developing time running till 2 hours.

    I was quite curious to know what kind of result they will achieve with such a long developing times.

    How they determine the developing times and developer concentration for a given film speed?
     
  2. P C Headland

    P C Headland Subscriber

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    Do a search here on Stand Developing - there's plenty of info as to the why's and wherefore's. The most common developer for this is Rodinal diluted 1+100 to 1+200.
     
  3. Gerald C Koch

    Gerald C Koch Member

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    Stand development should only be used to compress the tonal scale of a contrasty subject. It is not a general purpose developing method.
     
    Last edited by a moderator: Jul 13, 2011
  4. Neanderman

    Neanderman Member

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    You can also use a 'water bath' process to achieve compaction. Here, you alternately place the negative in the developer for a short time, with agitation, then move it to a tray of water, where you let it sit. If you do this back and forth, because the highlights -- where there was more exposure -- will exhaust the developer more rapidly, you can build up proportionally more density in the shadows.

    The risk is that you may get uneven development and/or what is known as 'bromide drag.'