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Thread: Travelers: New X-ray machines WILL ruin your film

  1. #41

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    Re: Travelers: New X-ray machines WILL ruin your film

    Quote Originally Posted by Bob Salomon View Post
    Since Congress doesn’t seem to do much why don’t you ask your Representative and your Senators to find the answer?
    Politicians don’t listen to me; there is no political issue here to solve. Besides, I’d like a credible answer. If all I wanted was smoke blown up my skirt I’d read some of the inane posts in this this thread.

    It’s purely an engineering question for which nobody has data to support or refute assumptions and fears.

    As you well know, back in the days before film became a niche item there was a consortium that did testing that was the basis of TSA and film company recommendations regarding film safety at airport x-ray inspection.

    Nobody cares any more...

  2. #42

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    Re: Travelers: New X-ray machines WILL ruin your film

    Quote Originally Posted by BrianShaw View Post
    Politicians donít listen to me; there is no political issue here to solve. Besides, Iíd like a credible answer. If all I wanted was smoke blown up my skirt Iíd read some of the inane posts in this this thread.

    Itís purely an engineering question for which nobody has data to support or refute assumptions and fears.

    As you well know, back in the days before film became a niche item there was a consortium that did testing that was the basis of TSA and film company recommendations regarding film safety at airport x-ray inspection.

    Nobody cares any more...
    They can get the information you want divulged. But you could also ask PMA or NPPA or ASMP or even Nat Geo or a large news paper.

  3. #43

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    Re: Travelers: New X-ray machines WILL ruin your film

    Sorry Bob, but I doubt it...

  4. #44

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    Re: Travelers: New X-ray machines WILL ruin your film

    Quote Originally Posted by BrianShaw View Post
    Sorry Bob, but I doubt it...
    Then you should try it as you arenít getting an answer here.

  5. #45

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    Re: Travelers: New X-ray machines WILL ruin your film

    The data probably doesn’t exist on those exact machines... no matter who is asked. Why would anyone bother figuring out if film is vulnerable to CT since it’s already well understood. Right now I’m still busy working for a living to pay for a family. But maybe when I retire I’ll crowdfund an effort to actually measure the impact of these new CT machines. I have more than just a passing knowledge of the past efforts. But I don’t work cheap so the funding will have to be generous!

  6. #46

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    Re: Travelers: New X-ray machines WILL ruin your film

    Okay, my point is that if it screws up light meters-what does it do to digital sensors in cameras?

  7. #47

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    Re: Travelers: New X-ray machines WILL ruin your film

    There's not been any evidence posted that it affects light meters. That was brought up in post #19, but the poster did not offer any reason for being concerned that the X-ray machine would affect silicon photodiodes. He contacted the TSA, and the TSA response was basically "we can't assure you that it won't affect light meters." I can't blame them for that. I haven't seen one of these machines or passed anything through it yet.

    In general, I believe the semiconductor junction of a typical SPD light meter is larger than an individual pixel of a CCD or CMOS sensor (which are a few microns), and size typically makes a semiconductor more tolerant to individual faults such as radiation damage. If the X-ray machine were harmful to light meters, it would likely be destroying digital cameras left and right, and probably cellphones, computers, and other silicon devices.

    The light-sensitive reaction is different for film versus electrical sensors (CdS meter cells, SPDs, CCDs, etc) and so even if a X-ray machine exposes film, it doesn't necessarily follow that it damages electrical/electronic light sensitive devices. I can't assure you that it's safe, I'm just not worried about that aspect of it.

  8. #48
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    Re: Travelers: New X-ray machines WILL ruin your film

    I think the Light Meter comment was a confusion with 2 languages

    Perhaps the OP meant emulsion sensitivity
    sin eater

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