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

  1. #5961

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

    Click image for larger version. 

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ID:	218315Hey largeformaters!!!

    After some try-error with x-ray film, specially with the development part, I come to share some information that improved the quality overall.

    I will attach some photos-
    BEFORE: I did the classic DIP AND DUNK system- with 3 prism-shape buckets I have found in Ikea type store- 18x22 cm x 25 cm tall-

    CONTAINER 1: DEVELOPER-
    CONTAINER 2- WATER-
    CONTAINER 3. FIX-
    I ALWAYS DID DEVELOPMENT UNDER RED SAFE LIGHT- NEVER HAD A PROBLEM.
    It went like this-

    1- 6 hangers with film in container 2 (Water) for pre wash- 3-4 minutes.

    2- all to container 1-developer- inspection, dip and dunk-

    3- when they looked ok, back to container 2 ( water) to stop the developer-

    4- all 6 there for 2-3 minutes...then running water-

    5- fixer -

    6- back to container 2- and running water-FINAL WASH- hang to dry.
    ----------
    ------
    -------

    NOW, the process is similar, BUT it didn't work with "regular" tray development, because it was double sided film.

    so, no I do all 6 hangers for pre wash.

    then I have a small tray that fits 1 hanger -

    I LEAVE THE FILM ON THE HANGER, AND THE FLAP OPENED, FOR THE FILM NOT TO BEND AND TOUCH THE TRAY-

    I put 1 liter water on the tray + 15ml RODINAL-

    the development is much faster, and I use only 1 liter. That concentration is ok for 6-7 sheets-
    Same as before, after development, the hanger go back to water, to stop the developer-

    then FIX-WASH AND HANG TO DRY.

    -

    the issue was that with my first system, I hat to be EXTREMELY careful with the dip and dunk- do everything super slow- if not, I would have VERY UNEVEN DEVELOPMENT, specially on the edges, where the film meets the hanger-

    I hope its was of help-
    I will post the photos not, and some examples of "before-after" with both methods.

    PHOTOS - bucket with SPACE FOR 6 HANGERS

    detail of hanger with the flap opened so the film can't get scratches-

    Have a great day.

  2. #5962

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

    examples with system 1 and 2 for development- with and without uneven edges-

    2 examples with bad development and one with the "new" system-

    I forgot to mention before, that the tray I have now allows me to do 1 hanger at a time- but I have around little less that 2 minutes per sheet to develop-

    also I have noticed that the images look a bit more crisp in a way- maybe more concentrated developer acting faster makes this?

    Anyways, I hope the information is useful.

    AN AWESOME DAY TO EVERYBODY!!!
    Attached Thumbnails Attached Thumbnails 28.jpg   79.jpg   185.jpg  

  3. #5963
    Tin Can's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    All good!

    If you are happy we are happy

    I use very weak developer, Rodinol 1-100 about 7 minutes

    Quote Originally Posted by agustin.gd View Post
    examples with system 1 and 2 for development- with and without uneven edges-

    2 examples with bad development and one with the "new" system-

    I forgot to mention before, that the tray I have now allows me to do 1 hanger at a time- but I have around little less that 2 minutes per sheet to develop-

    also I have noticed that the images look a bit more crisp in a way- maybe more concentrated developer acting faster makes this?

    Anyways, I hope the information is useful.

    AN AWESOME DAY TO EVERYBODY!!!
    image

  4. #5964

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

    yes, well...1 liter water + 15ml RODINAL is a little bit stronger than 1+100---maybe 1+90???

    but it worked better

  5. #5965

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    May 2016
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    Re: Use of X-ray film: technical discussion with example images

    Quote Originally Posted by T.Chabry View Post
    I don't know about the UK but in France you have this website:
    https://www.xraystore.fr/613-les-fil...s-et-la-chimie

    I also bought Shanghai films from China a couple times and had no issues with fogging.
    Thanks for the link .
    Their doesn't seem to be a button to click so the website is in English , but I'll copy and paste into a translator and have a proper read .

    From France , I would imagine transport would be by road and rail , so should be a better option .

    I have a box of X-ray film in 10x8 size , so as soon as I finish building the camera back and refurbishing the 10x12 camera , I'll be taking a few test shots .
    I bought the film a few years ago and can't remember where it came from . I imagine it came from the States , so trying that should confirm if there are any problems when it gets shipped over here .

  6. #5966

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

    Hi! I got this Fuji mammography xray. For what I understand this one has emulsion only in one side right? How I identify which side is it?Click image for larger version. 

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  7. #5967
    Tin Can's Avatar
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    Re: Use of X-ray film: technical discussion with example images

    notch

    Quote Originally Posted by kanishka View Post
    Hi! I got this Fuji mammography xray. For what I understand this one has emulsion only in one side right? How I identify which side is it?Click image for larger version. 

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    image

  8. #5968

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

    Ah thanks! wasn't sure if this type have a notch

  9. #5969

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

    From the German seller?

  10. #5970

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

    What is primary and secondary emulsion?

    I am just reading data sheets for Kodak and Carestream mamography film and they speak about facing the primary emulsion to the luminescent screen. I thought mamography film is always coated only on a single side of the support, but it seems not to be always so. (Thy speak also of doouble coating and I first thought it could be that the one side is coated with two layers of emulsion, but it seems not.)

    Kodak states:
    The primary emulsion appears flat (dull) while the secondary emulsion has been given a shinier, browner appearance. The primary emulsion images the breast parenchyma up to an optical density of 3.0. The backside (secondary) emulsion crosses over to image the upper density and D-Max. The emulsions are different speed and composition so no interactions will occur
    What means for us the difference between primary and secondary emulsion?

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