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Thread: Midtone Machines - Automatic Film Processing Machine

  1. #121

    Join Date
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    Re: Midtone Machines - Automatic Film Processing Machine

    Quote Originally Posted by AndrewBurns View Post
    http://midtonemachines.com/news/bits-and-pieces/

    New blog post up, new heating tank that's working well, some ease-of-use firmware updates, getting some parts injection moulded etc. I've also added the ability to send the used chemical from any channel to any other channel, which allows for even easier replenishment without any external hardware.
    Do you have provision for tempered water wash cycles? If you use Kodak Flexicolor process C-41RA like all C-41 processing Developer 3'15", Bleach (Process C-41 RA) is 1 minute, or longer if you prefer, followed by fixer, 2 minutes. Minilab machines run 3 consecutive stabilizer baths instead of a water wash. The method most folks at home use is several water wash cycles followed by Kodak Flexicolor Final rinse. The final rinse is a wetting agent with a biocide to preserve the gelatin of the finished negative. One single stabilizer bath without a wash step to get rid of the fixer is not adequate. Kodak specs the wash 2 min at 38C , the non RA C-41 uses washing for 3 min 24-38C

  2. #122

    Re: Midtone Machines - Automatic Film Processing Machine

    Duolab, yep there's a separate line into the machine (separate from the 6 x chemical lines) for wash water. The pre-programmed cycles will include washing between each chemical and also at the end and the wash water is heated up to the process temperature. If you were to make your own recipe then you can do as much or as little washing as you'd like and heat the wash water to whatever temperature you like (between 20 and 45 degrees celcius that is), although I would encourage a wash between each different chemical unless you want some carry-over/cross-contamination because there's always a few drops left in the tanks and on the film even after draining.
    For a gallery of my work and to buy prints, please visit my website:
    www.andrewburnsnz.com

    Or for information about the Midtone Machines automatic film developer:
    Midtone Machines

  3. #123

    Join Date
    Dec 2014
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    Iowa City, Iowa
    Posts
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    Re: Midtone Machines - Automatic Film Processing Machine

    Quote Originally Posted by AndrewBurns View Post
    Duolab, yep there's a separate line into the machine (separate from the 6 x chemical lines) for wash water. The pre-programmed cycles will include washing between each chemical and also at the end and the wash water is heated up to the process temperature. If you were to make your own recipe then you can do as much or as little washing as you'd like and heat the wash water to whatever temperature you like (between 20 and 45 degrees celcius that is), although I would encourage a wash between each different chemical unless you want some carry-over/cross-contamination because there's always a few drops left in the tanks and on the film even after draining.
    Brilliant! I'm looking forward to further reports!

  4. #124

    Re: Midtone Machines - Automatic Film Processing Machine

    Another blog post update, I now have a 4x5 sheet film holder in the machine and it looks like maaaybe it could take a 5x7 holder?


    http://midtonemachines.com/news/a-lick-of-paint/
    For a gallery of my work and to buy prints, please visit my website:
    www.andrewburnsnz.com

    Or for information about the Midtone Machines automatic film developer:
    Midtone Machines

  5. #125
    ic-racer's Avatar
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    Feb 2007
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    5,693

    Re: Midtone Machines - Automatic Film Processing Machine

    Looking good!

  6. #126

    Re: Midtone Machines - Automatic Film Processing Machine

    Big news update this time, the Chromabox has finally processed some film! It's been a while coming... Just two sheets of FP4+ 4x5 today but they turned out great (IMO). I've also confirmed that the Chromabox-4 can also take up to 4 x 5x7 sheets at a time. More details in my most recent blog post:

    http://midtonemachines.com/news/miss...plished-kinda/



    For a gallery of my work and to buy prints, please visit my website:
    www.andrewburnsnz.com

    Or for information about the Midtone Machines automatic film developer:
    Midtone Machines

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