Temperature/ development adjustmetn for fiberpaper??

Discussion in 'B&W: Film, Paper, Chemistry' started by naaldvoerder, Sep 2, 2007.

  1. naaldvoerder

    naaldvoerder Member

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    This summer I can't seem to get my darkroom temperature below 24 degrees Celsius, so now the results obtained with my spligrade are off the mark. Does anybody know a temperature/development table as is included in the datasheets for Ilford film is usable for fiberbased paper?

    Thanks in advance
     
  2. TheFlyingCamera

    TheFlyingCamera Membership Council Council

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    I have problems with keeping my water temperature in my darkroom down in the summer - to help with it, I get a big bucket of ice and mix it with the water I'm planning to use for mixing my developer. With a bit of experimentation, you can blend the icewater and the regular water to get your temperatures down to 20-22.
     
  3. john_s

    john_s Subscriber

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    The Agfa pdf files for paper development had times for 20, 25 and 30degC. I can email you a copy if you're interested. Different times for different developers, but typically:

    ______ 20deg_______25deg______30deg
    Fibre___90__________60________45sec

    Rc_____ 60_________45________30sec

    Sorry if the formatting isn't up to twenty-first century standards. I'm not with it! (but that's why my camera doesn't have a battery)
     
  4. naaldvoerder

    naaldvoerder Member

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  5. dancqu

    dancqu Member

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    Let me guess; contrast is up some. What developer are
    you using? If it contains hydroquinone and or glycin then
    you've a more temperature sensitive developer. At least
    hydroquinone is a high contrast component and when
    more active will up the contrast.

    I've read that glycin is a high ph metol. It is compounded
    as so. It also is reported to be usefully active at warmer
    temperatures. It would not up the contrast. Dan
     
  6. Tom Hoskinson

    Tom Hoskinson Member

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    Dan: GLYCIN is p-hydroxyanilinoacetic acid.

    Glycin is a slow powerful developer which keeps well in solution. The image it produces is a warm black color and is very free from fog.

    Glycin is related to p-aminophenol and Metol.

    Compared to Metol, glycin has a carboxyl group attached to the methyl group of the Metol.

    Metol is p-(methylamino)phenol sulfate. Thus, Metol has a Sulfate attached.
    Glycin has a carboxyl group (acetic acid) attached.
     
  7. dancqu

    dancqu Member

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    All the above and to boot recommended for stand development. Dan
     
  8. Tom Hoskinson

    Tom Hoskinson Member

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    Agfa 8 dilution for stand development

    Yes Dan, and to finally answer your previous Agfa 8 question, I dilute 100 ml of Agfa 8 stock solution with 400ml of water for stand development. I develop Efke 25 for 18 minutes at 22C with Semi-Stand agitation.

    1. 2 minute presoak in 22C water.

    2. 30 seconds of gentle agitation in the developer.

    3. Stand without agitation for 9 minutes.

    4. 30 seconds of gentle agitation in the developer.

    5. Stand without agitation for the remainder of the 18 minutes.

    6. Rinse in 22C water (no acid stop bath), Fix and Wash












    i
     
  9. dancqu

    dancqu Member

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    Agfa 8? Another thread's OP interest. Mine, Kodak D-78. Dan