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Thread: Use of X-ray film: technical discussion with example images

  1. #6031

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    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by Tin Can View Post
    Superbright have no markings, on both the old 1 watt and new 2 watt

    They look identical, but one is way more powerful
    I love how visible there are compared to my incandescent safe light which takes me 2-4 minutes before I can see anything in the room. I’m hoping the rubylith will make the light safe without reducing the ambient light too much.

  2. #6032

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    Re: Use of X-ray film: technical discussion with example images

    I used Carestream X-ray film for several years. I’m now testing Fuji and ran into something strange. I use BTSD methods and ran the tests with a step wedge and Plotter software. While most folks seem to shoot this film at ISO 80-100, my tests show EFS of 6-14. The tests show development times for Pyrocat that include SBR 7 (N) time of 7:15 which seems in line with what others have reported. I went out and shot a full range scene that was SBR 7. The program gave me an exposure time of 3-minutes and a development time of five minutes 30-seconds. This just didn’t seem right to my eye and experience. I made a second exposure by my incident meter at ISO 100 - 1/30 second and developed for the 7:15 time.

    The long exposure came out far overexposed. The short exposure had a little less shadow detail than I like, so in the future I’ll try it at 80.

    Any idea why the Plotter software gives such low EFS and resulting long exposure times, while at the same time giving what seems to be correct development times?

  3. #6033
    Tin Can's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    I don't think Fuji or Kodak would make wildly diff Medical X-Ray film

    I have some industrial X-Ray coming, that MAY be different

    It's 5X7, which I never saw in Medical

  4. #6034

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    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by j.e.simmons View Post
    The long exposure came out far overexposed. The short exposure had a little less shadow detail than I like, so in the future I’ll try it at 80.
    I don't have the tools or skill to do what you did, but with a little experimentation, I shoot HR-U at EI80 and developed in Rodinal 1:100. I haven't tried in Pyrocat yet, since I'm only just starting experimenting with Pyrocat in other contexts. Once I'm more familiar with it, I may try HR-U in it.

  5. #6035

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    Re: Use of X-ray film: technical discussion with example images

    Sandy King wrote in some thread years ago that Effective Film Speed and ISO are not the same but should be close.

  6. #6036
    Philippe Grunchec's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    BTW, where do you buy your 8x10" Mammo films in the US? This size is not available in Europe, I have to buy 18x24cm and the ration is not exactly the same.
    Thx in advance.
    "I believe there is nothing more disturbing than a sharp image of a fuzzy concept!" (Ansel Adams)

    https://philippe.grunchec-photographe.over-blog.com/

  7. #6037
    Tin Can's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    I think new 8x10 mammo is extinct

    Maybe expired available on eBay USA

    https://www.zzmedical.com/x-ray-acce...-ray-film.html

    I used them for almost a decade, very reliable source

    I don't think I will ever run out of my pile

    Quote Originally Posted by Philippe Grunchec View Post
    BTW, where do you buy your 8x10" Mammo films in the US? This size is not available in Europe, I have to buy 18x24cm and the ration is not exactly the same.
    Thx in advance.

  8. #6038

    Re: Use of X-ray film: technical discussion with example images

    Kodak Min-R Single Sided Mammography 18x24cm by Nokton48, on Flickr

    Here is my stash of 18x24 single sided.

    Sinar Norma 18x24 Lisco Holders XRAY by Nokton48, on Flickr

    An 18x24cm contact printed on the larger 8x10 paper allows a nice black border IMO
    Flikr Photos Here: https://www.flickr.com/photos/18134483@N04/

    “The secret of getting ahead is getting started.”
    ― Mark Twain

  9. #6039

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    Re: Use of X-ray film: technical discussion with example images

    So here I am 604 web pages and post count so high I dare not even think in those terms, lest I fear an explosion of the brain. How do i sort through all that to find a few answers and testimonials of Fuji HR or HRT Green and Rodinal combination? It seems to be the favorite combo to achieve convenience, yet true continuous tone in 8x10 tray use. Thank you.

  10. #6040
    Corran's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    Just start with 1:100 for 6 minutes, EI 80, 70 degrees and go from there.
    Bryan | Blog | YouTube | Instagram | Portfolio
    All comments and thoughtful critique welcome

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