Winsor Crosby Long Beach, California wrote:
<< With all the design to light spectrum that the film companies do I
wonder whether they give any effort to making film insensitive to
Xray? And are some better than others? >>
The light spectrum design - how would that be done? With different colour
sensitive layers in different proportions and different filter layers? That
may be kind of a separate issue from X-Rays which just blast through the
emulsion and, being ionising radiation, ionise anything they can and make it
react. I don't know how you could stop that, except my making the film
canister thicker and/or out of lead!
I'd guess that the metal (steel) film canister is the most useful bit to
protect the film from X-Rays. I suppose some film chemistries _might_ be more
prone to X-Rays then others, but have no idea whether or which! I have never
heard this mentioned before you just wrote it! :-)
Maybe its better to have your camera empty and all films either new or fully
rewound, in case you have to take them through the X-Ray machines. But if you
have a metal camera (metal back) etc., you're probably better off with a
partially used film in the camera than if you have a plastic wonderbrick with
800 ASA "Zoom" film inside! ;-)
Dave Bellamy.
http://members.aol.com/synthchap/
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|