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Airport x-ray machines can damage your film by fogging

New X-ray inspection units for viewing checked luggage at airports in the USA and worldwide use a combination of X-ray doses and computed tomography (CAT) that can affect your film.

These units protect the traveler better because of the increased abilities to detect weapons and plastic explosives but they add a new possibility of fogging photographic film.

Here is advice for you film protection:
Pack no film in luggage you check, all film should be in your carry-on luggage.
Request hand-inspection of your carry-on film, rather than put it through the X-ray devices used to examine carry-on luggage.

Why?
First: while the traditional X-ray devices that "looked into" your carry-on luggage did not fog low-speed film, some of these new high-powered X-ray devices are being used to examine both carry-on and checked luggage.
Second: cumulative X-raying of film on a multiple segment flight will have an effect on your film - even low-speed film.

So from now on, request hand-inspection of all your film and of any cameras that are loaded with film. It pays to be safe, since the damage to your film will not be visible until your film comes back from the photofinisher.

X-ray machines and your digital equipment

The effect of multiple passes through airport X-ray inspection units on digital photo equipment is not known.
It believed that such inspections will have no effect.
But ... better be safe than sorry!
Avoid repeated x-ray inspection: id your digital camera and storage devices.
Requesting hand inspection will always be safer.