Page 103 of 616 FirstFirst ... 35393101102103104105113153203603 ... LastLast
Results 1,021 to 1,030 of 6151

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

  1. #1021
    Lee Smathers
    Join Date
    Dec 2012
    Location
    Daegu, South Korea
    Posts
    371

    Re: Images shot on X-ray film

    Quote Originally Posted by Randy View Post
    Lee, did you have any problem with scratches? I am plagued with them in my processing and am probably going to have to resort to processing one sheet at a time with tray processing. I had not heard of the agitation method you mentioned - raising and alternating corners. I usually process 4-6 sheets at a time pulling the bottom sheet out and laying it on top. Scratch city! BTW, I have gotten very good sharpness from my scans and have not striped the back side of any negs.
    Jim suggests two approaches. 8x10 stainless steel tank/hanger method or single image in a flat bottomed tray. I don't have a flat tray. Cesco makes them. But the remaining photo supply stores in South Korea only seem to offer trays with bumps in the bottom. I'm looking into alternatives, but most plastic tupperwares have a single 1 cm round bump in the middle. A TA recommended stainless steel cooking trays, but they're about $17-20 for an 8x10ish tray. I might just pay the shipping and order a few trays from freestyle photo with some other goods. In the meantime, I'm using 8x10 contact glass in the bottom if the trays. I'm waisting chemistry though. For one sheet, I have to use 1500 ml. So I cheated and processed two negatives (one at a time) in the chemistry before remixing.

    The agitation method: not sure where I got it from perhaps a mix of sources. I wanted to make sure it was even development. Perhaps doing all four corners at the 1 min mark would be sufficient. I may have taken the PMK pyro advice and done one corner per 15 seconds. I've seen to have heard it say that it's not so much the process or agitation but the consistency that matters. It's the nature of the film, but the negatives are a bit contrasty for my tastes. I might try a test with shorter times and let the 7min developing time be my N+ development.

  2. #1022
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    4,806

    Re: Images shot on X-ray film

    When using hangers, try not to pull the frame all the way out of the developer, otherwise you will end up with surge marks. I gave up on hangers for this reason and for the excessive amount of developing solutions required.
    If you don't have flat-bottomed trays, place a sheet of plexi-glass in the bottom of the tray. I've done that for 14x17 before I found flat-bottomed trays.

  3. #1023
    LF/ULF Carbon Printer Jim Fitzgerald's Avatar
    Join Date
    Aug 2007
    Location
    Vancouver Washington
    Posts
    3,865

    Re: Images shot on X-ray film

    I've used Pyrocat HD for all of my work. 1:1:100 dilution. 8x10's in tanks, 1 gallon four at at time and have never had surge marks. I presoak develop and stop and fix as I do for my regular film. I don't yank the holders up but a nice steady up, tilt down movement. As others have said for ULF one at a time in a tray. With a gallon of developer that I mix from scratch I find that I can develop 12 sheets of 8x10 per run. X-ray film develops in most anything and find the best that works for your method and stick with it.

  4. #1024
    Lee Smathers
    Join Date
    Dec 2012
    Location
    Daegu, South Korea
    Posts
    371

    Re: Images shot on X-ray film

    Quote Originally Posted by Jim Fitzgerald View Post
    I've used Pyrocat HD for all of my work. 1:1:100 dilution. 8x10's in tanks, 1 gallon four at at time and have never had surge marks. I presoak develop and stop and fix as I do for my regular film. I don't yank the holders up but a nice steady up, tilt down movement. As others have said for ULF one at a time in a tray. With a gallon of developer that I mix from scratch I find that I can develop 12 sheets of 8x10 per run. X-ray film develops in most anything and find the best that works for your method and stick with it.
    That's good information. I figured for my EI test, I might be able to develop all 4 of my negatives in the same mixed developer but wasn't sure so only did 2 - being a test and all. I figured after I figured my EI and times I could try developing more negatives in the solution to find my limitations.

  5. #1025
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    4,806

    Re: Images shot on X-ray film

    I guess I just have more patience than most...or no social life

  6. #1026
    LF/ULF Carbon Printer Jim Fitzgerald's Avatar
    Join Date
    Aug 2007
    Location
    Vancouver Washington
    Posts
    3,865

    Re: Images shot on X-ray film

    Quote Originally Posted by Andrew O'Neill View Post
    I guess I just have more patience than most...or no social life
    Andrew, I agree! With my better half teaching English in Timor Leste till the end of the year I have time to build cameras and add comments when I can. Patience is one of those things that carbon printers and camera builders must have or it does not work at all.
    When I develop ULF sheets what is the rush. One at a time and you are done at some point. It is always the end result that counts.

  7. #1027
    Randy's Avatar
    Join Date
    Dec 2010
    Location
    Virginia, USA
    Posts
    1,455

    Re: Images shot on X-ray film

    As for processing one sheet at a time in flat bottom trays - Do you place the film in the tray with the exposure side facing up, or does it really matter?

    Since most X-ray films (all that I have used) have emulsion on both sides, with this method I am guessing both sides develop evenly as long as sufficient agitation is employed. With that assumption, since one side of the film is against (slightly coming in contact with) the flat bottom of the tray, and yet it develops as evenly as the top side of the film, could you not develop more than one sheet at a time by using the same method of agitation? Could you not develop 3-4 sheets at a time?

    Randy, why do you ask? Because processing one sheet at a time goes against every fiber of my being. I have the patience of a 2 year old.
    https://dl.dropboxusercontent.com/u/52893762/bigger4b.jpg

  8. #1028
    LF/ULF Carbon Printer Jim Fitzgerald's Avatar
    Join Date
    Aug 2007
    Location
    Vancouver Washington
    Posts
    3,865

    Re: Images shot on X-ray film

    Randy, when I do my ULF sheets one at a timeI make sure that I have a gallon of developer in my 16x20 tray. Now I'm doing 11x14, 8x20 or 14x17 so it is a good idea to use enough developer. If you are shooting ULF you HAVE to have patience. If you are shooting 8x10, trust me when I tell you that tanks are the way to go. Gallon tanks and four sheets at a time and you are done very quickly. I did twelve sheets last night. Remember 6 minute develop times. With the red light on you judge the development.Piece of cake. So tanks are for those with little patience. I have patience..... but I'm no doctor. Sorry could not resist!

  9. #1029

    Join Date
    Mar 2011
    Location
    Dallas/Novosibirsk
    Posts
    2,205

    Re: Images shot on X-ray film

    Quote Originally Posted by Jim Fitzgerald View Post
    but I'm no doctor
    "you patient be patient..
    no doctor - keep warm, call ambulance.." (c)

    btw, i tried 5 minutes for Rodinal 1+50.. seems to work quite well @ iso 100 or so (constant agitation)

  10. #1030
    おせわに なります! Andrew O'Neill's Avatar
    Join Date
    Sep 2003
    Location
    Coquitlam, BC, Canada, eh!
    Posts
    4,806

    Re: Images shot on X-ray film

    Randy, I place the sheet in the tray with the exposure side (the side that was facing the lens) facing up.

    Anybody want some 8x10 hangers?

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
  •