Page 501 of 616 FirstFirst ... 401451491499500501502503511551601 ... LastLast
Results 5,001 to 5,010 of 6151

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

  1. #5001
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    18,961

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

    Some of us tried Ziplock bags when somebody else suggested it. It works, one at a time.

    Randy if you already have deep tanks and hangers gas burst can be DIY.

    I do use stuff made by somebody else.

    But I will be trying some other ideas. All you need to try Gas Burst is a Poly tube with tiny holes, attach a timing valve and any adjustable 10+ psi air supply. Maybe a full tire...I use my shop air compressor.

    It takes a while to tune it, but once it's set, it runs and runs.

    I burst for 1 second 10 PSI every 10 seconds for 10 minutes usually. Water rise should be 1/2 to 1". I go low. You don't need N2 for one shot developer or any fixer.

  2. #5002

    Join Date
    Jul 2013
    Location
    Queensland, Australia
    Posts
    474

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

    Thodoris I'm glad you have managed to get the tubes to work, I tried with the old cibachrome tubes but with little success, the film is too flexible to stay in place and I would always find the two negs stuck together. Tray developing of 4x5 would produce mottled skies. I had success with the mod54, but at first had the same problem, the xray film was too flexible and they would flex out of the holders and I would find them stuck to the side of the tube. I drilled holes in the ends and applied a bit of silicone to form a nipple, that way they could not flex out and escape from the mod 54, works a treat now.
    As for 8x10 I have not had probs in tray at all, only downside is you can only do one at a time. with tray I just use a circular motion making sure the film hits against each side of the tray for a couple of laps then flip, but still use the same dilute developer of about 1:150

  3. #5003
    Randy's Avatar
    Join Date
    Dec 2010
    Location
    Virginia, USA
    Posts
    1,454

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

    Andrew, are you using flat bottom trays or glass in the bottom? And are you saying you just rock the tray from each side, then flip the film over?

    Randy - I tried the Ziploc bag as well - so long ago I can't remember my results. I am guessing I did not like it.
    https://dl.dropboxusercontent.com/u/52893762/bigger4b.jpg

  4. #5004

    Join Date
    Jul 2013
    Location
    Queensland, Australia
    Posts
    474

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

    Randy I use the old flat bottom ceramic trays. I rock the film into the end of the tray then the side then the bottom and the other side, circular. Do that a couple of times then flip. You can't really tell which side is which, as one always seems to develop out faster, continual flipping helps discern which side is which.

  5. #5005

    Join Date
    May 2013
    Posts
    157

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

    For the little I have developed 2 sided Xray film so far, I used what I had on hand, big Cesco-Lite flat bottom plastic trays left over from a print shop and Beutler's developer. And then made sure I didn't have fingernails that needed clipping. I rocked and agitated and flipped the film continuously (Fuji green sensitive 8x10). Being deft of hand with reasonable gentleness, scratching problems were quite minimal. Certainly nothing to inspire me to try all kinds of other ideas. The best other idea I know of is paying up for the one-sided stuff, which kind of defeats the whole thrill of "cheap". Cheap film I can shoot away with and not try to be an artiste, which I'm not. If I come up with a good picture once in a while, it wasn't because I was so talented and sure that I could buy the expensive pan stuff.. I can't see why any other smooth flat-bottom tray won't work just as well.

  6. #5006

    Join Date
    Jul 2013
    Location
    Queensland, Australia
    Posts
    474

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

    Quite right! I have some old pyrex dishes that work just as well or some stainless steel warming trays from a bain-marie. I'm sure I read somewhere that if you are getting bad development, get some food dye and put a couple of drops in your dish with water and check the dye to see if the water is agitating enough.
    Funny, I cant get the same even development with 4x5 in trays.

    This scanned negative is a section of an 8x10 taken on a 3d camera, the positive then has the lenticular plastic screen laminated to it. Havent got a laminator and the adhesive film is quite expensive. The camera works fine since packing, the newspaper used to pack is dated 1988.
    Click image for larger version. 

Name:	enlarged section.jpg 
Views:	174 
Size:	85.9 KB 
ID:	177030

    Agfa green 8x10 developed by flat bottomed tray rodinol 1:135-ish

  7. #5007
    Peter De Smidt's Avatar
    Join Date
    Jan 2001
    Location
    Fond du Lac, WI, USA
    Posts
    8,406

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

    Anyone pick up a cheap x-ray film developing machine to use for in-camera use of x-ray film?
    “You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
    ― Alexander Den Heijer, Nothing You Don't Already Know

  8. #5008
    DeKlari's Avatar
    Join Date
    Mar 2016
    Posts
    15

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

    I have try it at work. It make many micro lines and micro scratches. Negative looks fine for science or medicine but not good for photography.. I guess

  9. #5009
    Peter De Smidt's Avatar
    Join Date
    Jan 2001
    Location
    Fond du Lac, WI, USA
    Posts
    8,406

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

    Quote Originally Posted by DeKlari View Post
    I have try it at work. It make many micro lines and micro scratches. Negative looks fine for science or medicine but not good for photography.. I guess
    Good to know. Thanks!
    “You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
    ― Alexander Den Heijer, Nothing You Don't Already Know

  10. #5010

    Join Date
    Oct 2015
    Location
    Nicosia, Cyprus
    Posts
    90

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

    Quote Originally Posted by Randy View Post
    It does help - thanks. I will look into the 3" tubes. If you get a chance, perhaps post a picture of your tube assembly some time - or if there is one already posted somewhere, can you direct me to it. Thanks.
    Randy (and anyone else who might be interested),

    Finally took some pictures of the PVC tubes that I mentioned testing.

    Top pic from left to right:
    18x24cm/8x10" tube (takes one film).
    13x18cm/5x7" tube (takes two films).
    End cap assembly, glued to a coupling.
    Coupling by itself.
    Screw cap with its base.

    Bottom pics from left to right, looking through:
    18x24cm/8x10" tube
    13x18cm/5x7" tube (with the "stopper" of the coupling protruding, which helps the two negs stay away from each other)
    Coupling



    Now, since my last post I developed 10 more sheets of 18x24cm film.
    Half of them single-sided mammography film, and half double sided.
    8 came out ok.
    1 refused to come out for washing (even though after fixing I place the tubes vertically in the sink and fill them with water to reduce friction), resulting in two massive scratches on the back side.
    1 came out with streaks of uneven development (no idea why).

    Also, I don't have a motorized roller base (had plans of building one if/when I concluded that this developing method works for me), and I can tell you that manually rotating the tubes for 16min for each sheet gets old real fast.

    In conclusion, this method might be worth looking into, only if you have a motorized roller base, *and* you shoot a relatively small amount of film.

Similar Threads

  1. Technical Pan Film
    By Jehu in forum Darkroom: Film, Processing & Printing
    Replies: 34
    Last Post: 22-Apr-2016, 18:42
  2. Images, not technical discussions.
    By rdenney in forum Image Sharing (Everything Else) & Discussion
    Replies: 0
    Last Post: 23-Jul-2015, 14:16
  3. Replies: 91
    Last Post: 23-Jul-2015, 12:01
  4. T Max 400 Technical Discussion by Sandy King
    By Michael Kadillak in forum Darkroom: Film, Processing & Printing
    Replies: 38
    Last Post: 7-Feb-2006, 06:08
  5. Discussion: Pyro stain, silver rich film & thick emulsion
    By Pete Caluori in forum Darkroom: Film, Processing & Printing
    Replies: 10
    Last Post: 22-Nov-2003, 04:39

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •