RE: IR Film and Airport X-Rays

["Barry, Ken" <kbarry@xxxxxxxxxxxxxxx>]

Jeff:

I have also not had problems traveling with IR film.  When traveling
with 4x5 it is very hard to get a visual exam. (a hundred sheet box is
too big for them not to open or x-ray).  

I suspect that IR film is less sensitive to x-rays than regular film.
It is more sensitive to heat (IR range) not x-rays at low doses.  X-rays
are at the opposite side of the electromagnetic spectrum from IR.
(remember your high school physics?)

X-rays - Visible Light - Infrared

Hope this helps.

Ken Barry (kbarry@xxxxxxxxxxxxxxx)

>----------
>From: 	Pedro Cote[SMTP:pcote@xxxxxxxx]
>Sent: 	Tuesday, September 30, 1997 9:52 AM
>To: 	infrared@xxxxx
>Subject: 	Re: IR Film and Airport X-Rays
>
>Jeff Spirer wrote:
>
>> Is there any reason to believe that scanners at the airport will have
>> any
>> more effect on IR film than regular film.  I don't want to try a hand
>> check, since I am sure that some guard somewhere will insist on
>> opening the
>> canisters.  However, I expect to be in country (ies) that a) may have
>> the
>> machines turned up, and b) are highly unlikely to have processing
>> facilities.  They will have to go through unprocessed and processed at
>>
>> least two times (i.e., at least four times total.)
>>
>> Jeff Spirer
>
>Jeff:  I've never had a problem with HIE.  I always try to be careful
>and request a visual inspection, but several years of crossing airport
>X-rays  have not produced any fog in the film.
>
>Good luck, -Pedro
>
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