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

  1. #5331
    おせわに なります! Andrew O'Neill's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    Since I've been playing around with Adox CMS 20II and POTA, I thought I'd develop some double-sided green latitude xray in POTA. I normally process with Pyrocat-HD and I wanted to see how it would look. Both sheets were developed for 8:00. The sheet on the left was in straight POTA. The one on the right, POTA 1+1. Tray developed (flat-bottomed). Slight agitation every minute. 24C. Reciprocity correction was given for both...4sec became 8sec.

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  2. #5332

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

    Quite a difference andrew, even under the stairs, are you surprised by the results??

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

    Yes, I was a bit surprised. I wasn't expecting the diluted version to have more contrast. Then I realised I shot them both at the same EI. For serious work, I'd probably give a third stop more exposure (or more) when using 1+1.

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

    Now is the Time to Upgrade to Digital X-Ray

    Just got this in an email

    https://mailchi.mp/zzmedical/vz93vwe...1?e=8b605a7efd

    The End IS NEAR
    Tin Can

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    Serious Amateur Photographer pepeguitarra's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    It looks like the images taken with the X-Ray are neater than the ones taken with the LF camera. In any case, I am waiting for my request to upgrade to digital too. I have bought from them about 400 sheets.
    "I have never in my life made music for money or fame. God walks out of the room when you are thinking about money." -- Quincy Jones

  6. #5336
    おせわに なります! Andrew O'Neill's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    I've got about 300 sheets of 8x10 and about 80 14x17 sheets. Once they're gone, that's likely it for me and Xray. I've got so much conventional film to use...

  7. #5337

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

    Hey all,

    I have an 8x10 camera which I've shot a few negatives and it has been a complete failure. I think I'm doing everything right but must have missed something. I've processed 2 negatives at different times with no success. The first negative I got the faintest partial image when held up to light but pretty much unrecognizable. The film was very black and the emulsion was easily rubbed off with my finger nail. My second attempt yielded a completely black negative with no image whatsoever.

    Here is my process, worked under a 6watt red safelight.

    1. Exposed the negative. Each time was a different shutter speed and aperture.
    2. developed in D76 1:1 for 9 minutes at 20c.
    3. Stop bath tap water for 2 minutes.
    4. fixed with ilford rapid fixer for 5 minutes.
    5. water wash and hang dry.


    Any ideas what's going wrong?

    The x-ray film is fuji super HR-T 8x10 green latitude.

    The sheets appear to have an almost silver tone tone to them. Once I put them in the developer they turn dark black after about 5 minutes but no image ever resolves. When I'm finished i'm left with a black negative, no image, and the emulsion is almost gooey and easy removed with a light fingernail scrape.

  8. #5338
    おせわに なります! Andrew O'Neill's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    Oh I see you posted over here. Good! What ISO did you use? And probably D76 1+1 is too strong. Try 1+3 or weaker. Why the emulsion is gooey, says either something wrong with the film or processing. Xray film emulsion is very fragile when wet, so great care must be given...but it shouldn't be gooey.

  9. #5339

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

    Yup thanks.

    The film just says "medium speed" but I heard it's around 100 ISO.

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    おせわに なります! Andrew O'Neill's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by kendolinator324058943 View Post
    Yup thanks.

    The film just says "medium speed" but I heard it's around 100 ISO.
    ISO 100 should be fine... but depends a bit on the developer and dilution, too. So, I would try again but with a more dilute developer. Xray film is contrasty.

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