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Thread: Development help with HP5 8x10 under exposed

  1. #1

    Join Date
    Jul 2018
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    1

    Development help with HP5 8x10 under exposed

    Not paying attention, I misapplied my bellows extension factor.
    Instead of increasing my exposure 2/3 of a stop, I decreased 2/3 of a stop,
    so I effectively under exposed by a stop and a third.

    Typically my development time for HP5 is 13 minutes.
    I was shooting in the studio, tungsten lights, portraits, with an EI of 320.

    Can anyone suggest how much additional developing time I should use ?
    I have not worked out my n+ or n- times as yet.

    Thanks,
    Charles

  2. #2

    Join Date
    Jun 2014
    Posts
    1,320

    Re: Development help with HP5 8x10 under exposed

    As a rule, something like +25-30% should bring the contrast back on track, but there's no recovery of lost shadows of course.

  3. #3

    Join Date
    May 2009
    Location
    Barcelona/Catalunya
    Posts
    71

    Re: Development help with HP5 8x10 under exposed

    What do you plan to do with the negative? If you’ll use an enlarger, 25% or 30% will probably enough. If you’re contact printing with weird chemistry (platinum or whatever) you’d probably want to give a little more time, close to 50%. Shadows will depend on the constrast of the scene.
    Best,
    Pau

    Some pictures in Flickr.

  4. #4
    Thalmees's Avatar
    Join Date
    Jun 2006
    Posts
    287

    Re: Development help with HP5 8x10 under exposed

    Compensating development is another option.
    Also, you may post-expose and place it at zone II, plus extending development not more than N+1.
    When you could not find diffused out of focus area except by extending your bellows, do not forget to compensate.
    Good Luck.

    The generosity of spirit in this forum is great, its warmly appreciated.
    ------------------------------

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