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  1. #1

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    Development of 120 film-Chemicals

    Hello,

    I am fairly new to developing 120 roll film in a hands on basis. However the darkroom at school that I use has the equipment, chemicals neccessary. I believe they use something from Lauder apparently. The film is Ilford Delta 100.

    My question is for the chemical process are the chemicals used for 135 film going to be the same as for the 120 development? I.e. fixer, hypo, etc. Also what about the timing? More or less or perhaps about the same.

    Thank you.

  2. #2
    VoidoidRamone's Avatar
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    yep, it's all the same. But you do want to put more liquid (keeping the same ratios) into the tank so that you get evenly developed negs.
    -Grant

  3. #3

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    Chemistry is the same, volume is different and times might be different. Many photographers add as much as 20% to the time.

    Try a test roll first!

  4. #4

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    Quote Originally Posted by jim appleyard
    Many photographers add as much as 20% to the time.
    Why is the time different with the same film in different formats?

  5. #5
    rjr
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    Morten,

    ´cause the emulsion isn´t the same and the film bases are different - varying in thickness, in coatings, in reaction to the developers.
    Tschüss,
    Roman

  6. #6
    Ole
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    Quote Originally Posted by modafoto
    Why is the time different with the same film in different formats?
    Because there is less need to worry about grain. TF (35mm) negatives are often made to print well on grade 3, MF for grade 1 1/2 to 2.
    -- Ole Tjugen, Luddite Elitist
    Norway

  7. #7

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    Thanks for clearing this for me!

  8. #8
    rogueish's Avatar
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    check this place out (if you haven't already)
    http://www.digitaltruth.com/devchart.html

  9. #9

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    The times are often, but not *ALWAYS* different. Plus the sprocket holes in 35mm may help to add small currents during agitation.

  10. #10
    andrewmoodie's Avatar
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    Quote Originally Posted by rogueish
    check this place out (if you haven't already)
    http://www.digitaltruth.com/devchart.html
    Thanks for that link, it's really good.

    I'd like to know if there are more people out there who expand their dev times when processing 120 film.

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