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Thread: The Uranotype Thread

  1. #21
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    Re: The Uranotype Thread

    Adam Neder - San Francisco National Cemetary.



    https://armyatwoundedknee.com/2013/1...ished-bravery/

    Thomas

  2. #22

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    Re: The Uranotype Thread

    Very interesting looking print. Thanks for the link to more information about Sgt. Neder. The on CMO recipient I've ever met was decorated for action in Viet Nam. He was at a hotel in AL for a unit reunion and I was there for work ??15 years ago. His name tag had a picture of the medal on it or something like that or I would never have known.

  3. #23
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    Re: The Uranotype Thread

    Adam Neder - San Francisco National Cemetery, 2016.



    This shot was taken with a 300mm Imagon right after the one above which was taken with a 300mm Nikkor-W and printed this morning with fresh potassium ferricyanide developer and got solid borders and a better red. I like the Nikkor-W version better but the chemistry was old resulting in partially washed-away borders so I'll have to re-print it. I want to keep alternative prints on 8x10 paper so I can keep the mat and frame size the same as those from 8x10 negatives.

    Back in the '70's I ran into a Sioux family in Wounded Knee spent an enjoyable and interesting month with the Lakota Sioux on the Rosebud.

    Thomas

  4. #24
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    Re: The Uranotype Thread

    Indian Wars #2 (Adam Neder) - San Francisco National Cemetary, 2016.



    Uranotype.

    I reprinted the 300mm Nikkor-SW version which I like the best with the fresher developer. Now where am I going to find another Uranotype?.

    Thomas

  5. #25
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    Re: The Uranotype Thread

    Untitled San Francisco National Cemetery, 2016.

    http://spiritsofsilver.com/yahoo_sit...1024_large.jpg

    FP4+ on Hahn Platinum Rag.

    Thomas

  6. #26
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    Re: The Uranotype Thread

    thomas
    these are beautiful !

    a friend took his gieger counter to his uranium prints
    and it didn't register .. still the name gives people the willies

    looking forward to the next post!

  7. #27

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    Re: The Uranotype Thread

    Geiger counters only work with gamma and higher power beta radiation. They will not detect alpha radiation at all if I remember correctly. Alpha emitters are still dangerous if inhaled or ingested, ditto low power betas. With proper safety controls you can probably work with it with no more hazard than pyro or glycin developers---but that's just a guess. I do wear gloves when working with even low toxicity developers.

  8. #28

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    Re: The Uranotype Thread

    I should also say these are beautiful and it is nice as a former chemist to see people use other parts of the periodic table in service of art.

  9. #29
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    Re: The Uranotype Thread

    The Toaster - Hayward, California 2016.



    Structually damaged by the 1989 Loma Prieta earthquake, the building today sits abandoned in the geographical center of the very expensive San Francisco Bay Area. https://en.wikipedia.org/wiki/City_Center_Building. Directly across the street (Foothill Blvd) to the left sits the equally abandoned former headquarters of Mervin's Department Stores. Both buildings are havens for the homeless.

    Thomas

  10. #30
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    Re: The Uranotype Thread

    Quote Originally Posted by jnanian View Post
    thomas
    these are beautiful !

    a friend took his gieger counter to his uranium prints
    and it didn't register .. still the name gives people the willies

    looking forward to the next post!
    Hi John,

    If your friend failed to get a reading on his Geiger counter, then either the prints were not uranotypes or the Geiger counter was faulty. Since the half life of uranium is 4.5 billion years if the prints were made using uranium there clearly would be uranium atoms on the paper and a reading above the background radiation would be obtained. The counter can't distinguish between the different emissions: alpha, beta and gamma, but by moving the counter closer and farther away you can tell the difference. Up close a sheet of paper will block the alpha particles and at arms length you can hear the gamma radiation.

    There was a very interesting program on public TV last night immediately following NOVA about uranium: Uranium: Twisting the Dragon's Tail. http://www.pbs.org/program/uranium-t...-dragons-tail/ that is well worth watching if you haven't already.

    Thomas

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