Some DIY plate equipment

Discussion in 'Silver Gelatin Based Emulsion Making & Coating' started by alexhill, Jun 4, 2010.

  1. alexhill

    alexhill Member

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    I had to make some of the required equipment for coating dry plate emulsions. To help anyone else who might take up an interest, I wrote two instructables on how I made my leveling table and plate rack

    I am quite satisfied with the results from both.
     
  2. wildbillbugman

    wildbillbugman Member

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    Coating Plates In The Dark

    On the subject of equipment, I have constructed some glass and Super Glue frames for coating of glass plates in total darkness. I can position the plates by "feel", then just move the coating rod in one direction. See Attachments.
    Bill:cool:
     

    Attached Files:

  3. Kirk Keyes

    Kirk Keyes Member

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    Bill -

    I can't get your images to open. Any one else have that problem?

    As for myself, I bought some electrophoresis plate racks off ebay for $5 each that work pretty well.

    Kirk
     
  4. Ian Grant

    Ian Grant Subscriber

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    They load after a few seconds on my laptop.

    Alex is there another way to download your PDF's ? That sites not simple.

    Ian
     
  5. Photo Engineer

    Photo Engineer Subscriber

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    I have a coating surface that is 20x24" in size so that I can (and have) coated up to 16x20 paper sheets.

    When doing plates or film, I simply use a smaller coating blade which is 4" wide and with an undercut that is the width of the glass + the desired coating height which is usually 5 - 7 mils.

    This is shown in the sticky slide show in this forum. I tried to upload some photos, but got a "Security Token Missing" and when I tried to report this problem, I got an "Invalid path specified for message". Not my day. :sad:

    PE
     
  6. alexhill

    alexhill Member

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    http://www.instructables.com/pdf/Ma...ack/Make-A-Wooden-Photographic-Plate-Rack.pdf
    http://www.instructables.com/pdf/Le.../Leveling-Table-for-Dry-Plate-Photography.pdf

    Hopefully those links will take you directly to the pdf's for each file.

    PE, I've been flipping between wanting a coating blade to make up for my miserable skill :smile: and being determined to practice until I get it. Of course once I get some consistency, I will probably want a blade anyways because darkroom toys are fun :D
     
  7. Ian Grant

    Ian Grant Subscriber

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    Alex, you have to be a Pro member to access the PDF's so that's not an option. Many of us make information freely available.

    Ian
     
  8. wildbillbugman

    wildbillbugman Member

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  9. Photo Engineer

    Photo Engineer Subscriber

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    Use a puddle pusher with scotch tape to lift it. The tape is 2.5 mils so 2 turns gves you 5 mil undercut. Ride the pusher on two plates on each side of the plate you intend to coat, just as Bill shows above.

    OTOH, you can pour plates as most do today. I am awful doing this and as Mark Osterman has said, "you have not mastered this because the emulsion is dripping off your elbow".

    So, I use a blade.

    PE
     
  10. wildbillbugman

    wildbillbugman Member

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    Hi All,
    The reason I posted this is that I am coating in TOTAL darkness. I usually pour-coat ortho emulsions. But I cannot imagine pour-coating without some light. But I suppose that was what was done with the first commercial panchro emulsions. Of course, what helps one person may hinder another. I have found that the frames that I have made minimize bungling around in the dark. Also, taking ten slow,deep breaths between movements helps.
    Bill
     
  11. dwross

    dwross Subscriber

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  12. wildbillbugman

    wildbillbugman Member

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    To All,
    I first started working with glass frames as a result of Denise Ross's description on her website " Thelightfarm.com". The only thing that I he added are the "Guides" on both sides of the puddle pusher.
    Bill
     
  13. wildbillbugman

    wildbillbugman Member

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    The purpose of what I have labeled as "guides" in my diagrams is to hold the Puddle Pusher to one path. All sheets of glass are glued down and do not slide.
    Bill
     
  14. alexhill

    alexhill Member

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    Oh. Thats stupid. I'm sorry for that. It lets me download the pdfs so i'll post them on my google docs. If someone could mirror them I wouldn't mind in the least. The information is under this creative commons license. Not that I actually care what happens with it :wink:

    Plate rack
    Leveling table