dileep_prakash2 Posted December 19, 2001 Share Posted December 19, 2001 HI: I've been wondering if we can expose sheets of film used for X Ray or Ultrasound with normal daylight and get a picture. Or can these films be used for making large format negatives under an enlarger. Has anyone tried this out. Does it work? Thanks Dileep Link to comment Share on other sites More sharing options...
john_henderson1 Posted December 19, 2001 Share Posted December 19, 2001 I took a quick look at Kodak's data sheets. They have ablue-sensitive film, and a green-sensitive film, called X-ray B andX-ray G, respectively. I didn't look for an equivalent ISO speed. Asfar as spectral response, they'll record daylight images, but they arenot panchromatic. Link to comment Share on other sites More sharing options...
martin_jangowski Posted December 20, 2001 Share Posted December 20, 2001 You can use X-Ray film for daylight photography. However, it is onlysensitive to blue light (and UV). This is not a really big problem(there were only blue sensitive materials 100+ years ago, and theymade _really_ fine photos), but usually these films are coated on bothsides (to increase sensitivity). So, you will have a _very_ thickemulsion, heavy problems with halos and no sharp pictures... it mightbe worth a try, but only as a experiment. I don't think you can use itfor pictorial photography. Link to comment Share on other sites More sharing options...
david_willis Posted December 20, 2001 Share Posted December 20, 2001 The stuff we use in our lab has emulsion on both sides. However, I have seen some films in the trash that have a notch on the top, which, to me, may indicate that the emulsion is only on one side. I was going to try enlarging slides onto X-Ray films for alt process printing, but haven't really tried it yet. Link to comment Share on other sites More sharing options...
dileep_prakash2 Posted December 20, 2001 Author Share Posted December 20, 2001 If these films can be exposed using an enlarger then they may be worth a try when doing cyanotypes. Any suggestions. Link to comment Share on other sites More sharing options...
robert_garrett2 Posted May 15, 2003 Share Posted May 15, 2003 Sure can. I did a fair amount a year ago. Most of what was said above agrees with my experience, except that you can indeed get sharp negatives with X-ray film cut to 4X5 at f32 or 64. It works both with the single or double emulsion films. X-ray film however, causes problems with metering, as one might expect due to its blue sensitivity. So it may be iso 1 or 2 in blue-containing sunlight, but much slower at sunset, for example. X-ray film is good for negatives (or positives!) under an enlarger. Link to comment Share on other sites More sharing options...
robert_garrett2 Posted May 16, 2003 Share Posted May 16, 2003 With luck you can get free overage X-ray film some Radiology Dept. is throwing away. It is usually as good as fresh. Large format negatives can yield X-ray-sized transparencies with a gray scale admittedly compressed - but far from Kodalith - using paper developer. Backlit, they can be quite impressive. After all, the doctors have to see shades of gray in their X-rays. Another advantage is the thick film base. I'd very much like to hear from anyone else trying this rather strange approach, especially for landscape work. Link to comment Share on other sites More sharing options...
jim_galli4 Posted May 17, 2003 Share Posted May 17, 2003 Any time I mix up the chems for radiography film at work I always have some fun first enlarging 4X5's onto the 14X17 Type R films. They act more like paper than film. They work about as well developed in Dektol. In fact the other day we had to do some unplanned work with Radiographs and since I had thrown all of the developers away I had to come up with something quick. So I brought some Sodium Hydroxide from home to jazz up the Dektol with and we had our radiographs just fine. It's fun to make great big positives of your pics. They have a blue cast and when viewed on a translucent table with 3200k lamps they look neutral. Tonality just as nice as paper. I never tried as daylight taking film though. They should act just like a paper negative would. ASA about 1.5 - 3. Link to comment Share on other sites More sharing options...
robert_garrett2 Posted May 17, 2003 Share Posted May 17, 2003 Glad to meet you Jim. What pH do you bring the Dektol up to when you jazz it up? Alternatively, how much NaOH do you add to a gal.of Dektol? And how does that help the development of the film? Just increase the developer capacity? Link to comment Share on other sites More sharing options...
jim_galli4 Posted May 17, 2003 Share Posted May 17, 2003 Hi Robert. Sorry, no particulars. Strictly seat of the pants. I added about 1 1/2 tablespoons of NaOH to a gallon of Dektol to raise the PH/ increase developer activity because I knew from my ES&H sheets that Kodak Industrex used NaOH as the main caustic instead of the usual Sodium Carbonate. I never measured PH. The Xray film will develop just as well in normal Dektol though. We tried that too. Takes a bit longer. Let me know how you make out. You can't do it wrong, the stuff is bulletproof. Jim Link to comment Share on other sites More sharing options...
robert_garrett2 Posted May 18, 2003 Share Posted May 18, 2003 Thanks, Jim. I also do a lot of the Julia Childs stuff myself - a pinch here, a couple of pellets of NaOH there. What you say makes a lot of sense. Can't get back to the darkroom right away. Have a cardiac catheterization on line for sometime in the next couple of weeks. Bad ticker. No big deal; I'll look into this further when it is over. Good luck to you till then. Link to comment Share on other sites More sharing options...
xavier_maheu Posted October 6, 2010 Share Posted October 6, 2010 <p>I think you can use it as camera film, and I know you can use it under an enlarger to make big negatives because i just did so. my father's doctor gave me a few sheets of green sensitive, coated on both sides x-ray film to play with. I tried enlarging a normal negative on it, works fine and gives amazing results. I also made black and white slides by contact printing a negative, it works, but it is a bit grainy. then, i took that slide and enlarged it on some more film and it gave a nice big negative, with the same grain than the slide. I am definitively going to buy me a 100 sheet 8x10 box of the same stuff.</p> Link to comment Share on other sites More sharing options...
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