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  1. Re: Use of X-ray film: technical discussion with example images

    It is something that happens with the Fink-Roselieve tank if one tries to develope too many sheets of film at once. However, in this instance I was distracted from my duties.
    I usually develope no...
  2. Re: Use of X-ray film: technical discussion with example images

    I went to the windmill at Skidby yesterday.
    I was going to take a walk along a footpath into the village & back, but I saw this huge bank of lead grey clouds coming.
    The last thing I wanted was for...
  3. Re: Use of X-ray film: technical discussion with example images

    The film may be 100ASA, but is seems rather grainy. Is that likely to be because it is double-sided coating?
    The image is taken from x 30x40mm dental X-ray film used for research purpose in getting...
  4. Re: Use of X-ray film: technical discussion with example images

    I mentioned developing in Rodinal 1:200 for 6 minutes which I tried with dental X-ray film exposed in a 35mm camera.With the film developed in a tank I was agitating for the first 45 sec & then 15...
  5. Re: Use of X-ray film: technical discussion with example images

    I have never done tray developing. If you knew a film took 6 minutes in whatever juice in a tank, then it would be the same or pretty close for a tray? I am assuming that the different agitation...
  6. Re: Use of X-ray film: technical discussion with example images

    It would take a very long time to read through four thousand posts to find those that involve Rodinal and X-ray film.
    Those posts I have read mention a 1:200 dilution for 6 minutes or 1:100 for 4...
  7. Re: Use of X-ray film: technical discussion with example images

    I got two 8x4.2" trays from an electronics emporium.They are meant to be used when etching printed circuit boards and are flat bottomed.
    I can tape a bin bag over the window at night and Bob's yer...
  8. Re: Infos about 8x10 in. Carestream x-ray film

    Glass plates were probably thicker than film and you may need to insert something else in the plate holders in order the sheet film is kept totally flat.
    I believe that the correct safe-light for...
  9. Re: Use of X-ray film: technical discussion with example images

    I received some 4"x4" X-ray film: Crontex MRF 21 Plus & loaded it into some holders. I never heard of the film, so i assume it is double-sided unless a Forum member knows for sure

    The person also...
  10. Re: Use of X-ray film: technical discussion with example images

    For medical purposes I believe the correct exposure is given thus: Anode voltage & current flow in the X ray tube + time.
    Where sensitivity to X radiation is concerned the difference between bands D...
  11. Re: Use of X-ray film: technical discussion with example images

    Is dental X-ray film normally double-sided? That is what it looks like. The pocket had no lead foil inside. The film was enclosed in a fold of black paper.
    The emulsion/s, if there are coatings...
  12. Re: Use of X-ray film: technical discussion with example images

    I sacrificed one piece. The packet (& film) are impressed with a pimple mark in one corner, which shows which side should face the tube.
    You wouldn't know which side the emulsion was from the...
  13. Re: Use of X-ray film: technical discussion with example images

    If it were elephant size sheets the box would provide a thousand sheets of 4x5.
    Seriously: Does anyone know Cantonese, or whatever the script is?
    If the packet colours do not follow international...
  14. Re: Use of X-ray film: technical discussion with example images

    The first of my X-ray film has arrived... As you can see it was the box of dental films. I only ordered it on the 19th April & it came from China a week later!
    Can anyone read the script on the box?...
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    Re: 4x5 developing tanks?

    I have a Fink-Roselieve tank which looks like it can take several formats like 4x5, quarter-plate and 2x3. It is similar to the Yankee, except that the film sheets stand in 'portrait' format, wheras...
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    Re: using an aero ektar

    I have heard the Aero-Ektar were corrected for working wide open or nearly so and the correction focuses on the red end of the spectrum. I don't know if any of that is true. One of those on a 4x5...
  17. Re: Use of X-ray film: technical discussion with example images

    Barnacle: I wouldn't worry about stripping until we have developing technique worked out and have negatives that have a normal contrast you would see in a conventional camera film. I am going to see...
  18. Re: Use of X-ray film: technical discussion with example images

    Has anyone made images on D, E or F speed dental film?
    I know it is only 30x40mm, but I wondered what the effective speed was.
    I am aware of the differences between the speed ratings: F being 50%...
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    Re: Kodak T-9 Uranium Toner

    Excuse my ignorance but how dangerous is Uranium Nitrate? The fact you can send it by the postal system suggests it may not be significantly more dangerous than raw photographic chemicals such as...
  20. Re: Use of X-ray film: technical discussion with example images

    I mentioned the Non-Destructive Testing X-ray film from Foma, specifically Indux R8 in 10x12cm.
    Foma said that the stuff is to order. A minimum order of 63 boxes if they have a master roll in stock,...
  21. Re: Use of X-ray film: technical discussion with example images

    I just ordered some dental stuff off ebay. I am not going to give the number, in case that's taboo.
    The stuff is in yellow & purple boxes. The trademark appears to be a red elephant on a white...
  22. Re: "You can make posts but not read them" problem continues - we're aware of it

    I was half afraid that the site had been messed about with with evil intent.
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    Re: Technical Pan Film

    I am working my way slowly through some Lith/print film, which is no more than 1 ASA in Rodinal 1:50 for 7 minutes. I remember developing some 35mm Kodalith in the POTA soup I made up for the Tech...
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    Re: Film Holder Question

    I was looking at sources of X-ray film in the UK and noted the 9x12cm size, which is why I asked about the holders.
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    Re: Technical Pan Film

    I used to use Tech Pan in 35mm and I was developing the film in POTA after rating it at 50ASA. I even tried rating it at 100 in the same developer.
    I don't know what was special about the film base....
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    Film Holder Question

    Is it possible to get holders that take 9x12cm film yet are the same external dimensions as a 4x5 film holder?
    This may sound a rather stupid question at first but I am exploring using X-ray film,...
  27. Re: Use of X-ray film: technical discussion with example images

    Another Forum member just might get some 8x10 Agfa green sensitive and cut it down to 4x5 & I can get some that way.
    That is not certain and so I have looked at other options.
    Foma list a 10x12cm...
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    Re: Lantern Petzval question

    Well, apparently Jim Galli sold just such a lens and that was mounted on a 8 inch wide lens panel with not a lot of room either side.
    Obviously to use such a monster lens we are talking about a...
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    Re: Lantern Petzval question

    I have taken the Petzval out and it definitely does NOT illuminate the corners or ends of the 4x5 frame when focused at infinity.
    It seems better used close-up. The vignette is not so hard, but it...
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    Re: Lantern Petzval question

    The only guide I have suggests 20 degrees for a Petzval. Whether that figure means the central area of the image or the total circle of illumination I do not know.
    The book is by Conrad Beck C1903....
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    Re: Lantern Petzval question

    As the lens I had bought was from a projector it has no markings as to focal length or aperture. I had no idea if it would cover 4x5, but I expected not. What did surprise me was the rampant amount...
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    Re: Lantern Petzval question

    Update: I took my lantern lens out of the cupboard and extracted the rear component parts of the rear group. It was a screw-in ring, a spacer that slid in and the elements themselves. The rear flint...
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    Re: Lantern Petzval question

    seezee; The blog article on Petzval's by in the first link has a very dramatic shot at the top of a branch. It is exactly the way my Petzval behaves.
    Unless you have enormously deep pockets I guess...
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    Lantern Petzval question

    It looks to me the arrangement of a Petzval is a cemented pair at the front and a spaced pair at the rear.
    If that is so, what (optically) would the front part be called?
    I have not been looking...
  35. Re: Use of X-ray film: technical discussion with example images

    Is there anybody in the UK who cuts down X-ray film to 4x5? I am interested in trying some, but no not have a darkroom to do the trimming.
    If anyone can answer please send me a Private Message.
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    Re: Atomic X film - a brief review

    With shipping to the UK a box of 25 sheets is UK 33.87. It is getting rather close to the price of Ilford FP4, but still a bargain price-wise compared to the same quantity of T-Max 100. I know...
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    Re: Foma 4x5 film

    The Fomapan 400 I bought from a UK camera store. It will arrive on the 5th ir 6th April.
    When I hear 'exotic' sizes mentioned I think of obsolete formats or the really large stuff, where normally...
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    Re: Foma 4x5 film

    Upon returning to large format after a break I now see that Fomapan 400 is available in 4x5 sheet & I have a box of it on the way to me.
    When using Fomapan 400 in 35mm I found it grainy and lacked...
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    Re: New RETROPAN 320 soft

    What is it like compared to Fomapan 400 shot of the same subject and under the same conditions?
    I can get both Fomapan emulsions in 4x5.
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    Re: Atomic X film - a brief review

    I wonder if the film is the LF version of Shanghai GP3, which used to be all over ebay until recently?
    I found that the Shanghai worked out to be around 50ASA in Rodinal.
    The price of the Atomic X...
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