Re: Use of X-ray film: technical discussion with example images
Re: Use of X-ray film: technical discussion with example images
I could feel the ghosts! There was a murder/suicide committed at one time, there is one bedroom that you can feel the weight of something. Gulp! going back next week to take some more pics
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Re: Use of X-ray film: technical discussion with example images
Attachment 171826
I've been reversal processing X-ray film, giving a big beautiful (if slightly blue) black and white transparency. This is single-sided Carestream.
Quickie formula:
First developer: Ilford PQ Universal 1:5 8 minutes@68 degrees F
Bleach: Potassium Dichromate in Sulfuric Acid solution
Clearing: Sodium sulfite
Re-exposure: 1 minute
Second Developer: Ilford PQ Universal 1:5 5 minutes@68 degrees F
Note scratches on this example! The bleach makes the emulsion softer and even easier to scratch. This example was tray processed, leading to scratches. Usually I tank process, which gives less problems.
Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
vdonovan
Attachment 171826
I've been reversal processing X-ray film, giving a big beautiful (if slightly blue) black and white transparency. This is single-sided Carestream.
Quickie formula:
First developer: Ilford PQ Universal 1:5 8 minutes@68 degrees F
Bleach: Potassium Dichromate in Sulfuric Acid solution
Clearing: Sodium sulfite
Re-exposure: 1 minute
Second Developer: Ilford PQ Universal 1:5 5 minutes@68 degrees F
Note scratches on this example! The bleach makes the emulsion softer and even easier to scratch. This example was tray processed, leading to scratches. Usually I tank process, which gives less problems.
Can you tell me the advantages of making a positive? Is this something akin to making solarized negatives, these look quite spectacular on the right subject and also require a second exposure.
Re: Use of X-ray film: technical discussion with example images
There is no real advantage, other than that it is unusual. In fact, I find I get less control over the resulting image because the two developers both essentially go to completion. It's hard to control contrast, so I have to be more aware of contrast when shooting.
I mount these 8x10 transparencies in back-lit LED frames. They look quite beautiful with, as you say, the right subject.
Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
vdonovan
There is no real advantage, other than that it is unusual. In fact, I find I get less control over the resulting image because the two developers both essentially go to completion. It's hard to control contrast, so I have to be more aware of contrast when shooting.
I mount these 8x10 transparencies in back-lit LED frames. They look quite beautiful with, as you say, the right subject.
I once enlarged onto 4 sheets of 14x17" X-Ray, an image sized to the 4 panels. Hung in a backlit window. Only noticeable at night. No fade after a year.
Heck, I made an X-Ray positive print of a new clinic and gave it to my Doctor, who had no light box. As I found out...
Re: Use of X-ray film: technical discussion with example images
Quote:
Originally Posted by
vdonovan
There is no real advantage, other than that it is unusual. In fact, I find I get less control over the resulting image because the two developers both essentially go to completion. It's hard to control contrast, so I have to be more aware of contrast when shooting.
I mount these 8x10 transparencies in back-lit LED frames. They look quite beautiful with, as you say, the right subject.
Randy I remember you displaying them on the thread, looks pretty spectacular.
I have just dusted off an old book called "Photographic Amusements" by Fraprie O'Connor, it has a section on BAS-relief, combining positives and negatives to produce a unusual and sometimes 3d effect. Seems a similar procedure you are doing
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Re: Use of X-ray film: technical discussion with example images
Supposed haunted house, though I never saw anything. Super Angulon, 14 sec exposure, F22, developed in RO9 12 min 1:150
Re: Use of X-ray film: technical discussion with example images
:) I don't see anything either.
Re: Use of X-ray film: technical discussion with example images
Well obviously. X-rays go straight through ghosts... :cool:
Neil