2 Attachment(s)
Re: Use of X-ray film: technical discussion with example images
Attachment 218314Attachment 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.
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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.
3 Attachment(s)
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!!!
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
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!!!
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 :)
Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
T.Chabry
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 .
1 Attachment(s)
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?Attachment 219157
Re: Use of X-ray film: technical discussion with example images
notch
Quote:
Originally Posted by
kanishka
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?
Attachment 219157
Re: Use of X-ray film: technical discussion with example images
Ah thanks! wasn't sure if this type have a notch
Re: Use of X-ray film: technical discussion with example images
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:
Quote:
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?