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I was mistaken about using Rodinol. I only use it, but for the big tray and the 14x34” 2X XRay I used Ilford PQ at 1/9 and it was fully developed in 2 minutes. Water stop for 30 seconds and TF5 fix for 3 minutes.
I could watch it develop and it was fixed quickly.
I washed quickly also.
I just remembered how I did it.
A few experiments with Fuji Super HR-U 30 expired since...2009 :)
Rated ISO 50, 9x12 camera.
Just for reference i photographed the negatives with a m43 camera...
Development in Caffenol Black (no vitamin C) for 50-60mins, 21oC stand or semi-stand, gives as expected low contrast but a very interesting... pictorrealistic outcome, or like a pencil drawing touch
Attachment 190440
Attachment 190441
Then i tried Ilfosol 3. A good starting point i think is something like:
ISO 50
Ilfosol 3 , 19+1 dillution, 21oC.
4min
Constant aggitation the first minute, 5-6 aggitations every next minute.
Attachment 190442
With yellow filter 2x i had to overexpose 3 stops
Attachment 190443
Your experiments have been fruitfull, I think your results are very promising, well done
I have not read the 532 pages, so, can anyone tell me how you deal with reciprocity with X-ray film. Thanks, Pepe.
At the risk of being flippant, test with your workflow. When I read through the thread that was the overwhelming consensus, regardless of the particular question.
Pepe, most here do not shoot very long exposures.
I think I saw only one or two post about it. I have read most of the thread.
It is hard to search for but I just found these links in google. I used your words to search, there is a lot out there.
google search "reciprocity with X-ray film"
https://pubs.rsna.org/doi/10.1148/42.5.471
https://www.photrio.com/forum/thread...-effect.62519/
https://www.largeformatphotography.i...=1#post1296352
Thank you Randy. I found the links very useful, specially the last one. I am doing my own test, that is the reason I wanted to compare with others. I found that if I don't adjust for reciprocity, I can develop the film without any problem. I tested up to one minute without problem. When I tested for three minutes, I did noticed an over exposure (that is what I did yesterday), which prompted me to ask the question. The negs are still drying, so, I will post the result of this last try later.
Thank you. It is a great fun anyway :)Quote:
Originally Posted by andrewch59
Pepe,Quote:
Originally Posted by pepeguitarra
Since X-ray film is truly orthochromatic itis sensitive only to blue light. Thus, as the sung heads for the horizon, the film slows down accordingly and I Know of no one who is using it in situations which require long exposures. I guess there are those who use extremely small apertures and might runinto reciprocity, but I haven't heard of them.
Quote:
Originally Posted by Jim Noel
Well, I've used it all the time for long exposures. The fastest shutter speed for me was one second... still need compensation. Very poor reciprocity. Randy linked to my data that I've been using successfully for many years in the field. :)