Video of reversal processing of photo paper using Kodak R-9 bleach formula

Discussion in 'Alternative Processes' started by DonF, Oct 28, 2017.

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    DonF

    DonF Member

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    Looks good!
     
  2. scheimfluger_77

    scheimfluger_77 Subscriber

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    Very nice results, thank you for sharing your process. Two questions:
    1. Where did you get/create the bellows extension chart?
    2. Once you have neutralized the bleach how do you dispose of it.
    Thanks again.
     
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    DonF

    DonF Member

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    - I made up an Excel spreadsheet with plots for the lenses I own. I found the formula, and it was easy to make. I can send you a copy.

    - After neutralizing, it goes down the drain. I called the city sewer and water department He said the quantities were minute enough to be insignificant. He also said they treat for heavy metals. Note, adding the clearing bath does not neutralize, but changes the chromium to a less toxic form.
     
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    DonF

    DonF Member

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    I used a spreadsheet by Geoff Bowker for the chart. It is easily customizable.

    http://www.largeformatphotography.info/Bell_Ext.xls

    Best,

    Don
     
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    DonF

    DonF Member

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