I remember an old post on here which stated x-ray will not affect the film. Its best if someone who travels with this on a regular basis to confirm this though.

My suggestion would be to pack the bulk of your films in your checked luggage, and carry aboard only your cameras and a couple of packs of film. When you check your luggage, advise them that your luggage includes film, and to not X-RAY it.

The carry-on camera and film can be X-RAYed, but when you arrive at your destination, use up those films first. Rotate thru your film stock.

Another option might be to ship your films to the destination in advance (perhaps using Priority mail), and to have waiting for you when you arrive.

In general, I don't think that a single exposure to X-RAYs will have much impact, especially with lower ISO films. Repeated exposure, however, could fog the films.

I should add that the strength of X-RAYs can be much higher in Europe and Asia, vs the levels used in North America. Sensitivity to X-RAYs can be affected by the ISO of the film as well. PX-680 film will be more sensitive than PX-70 film.

Camera shops sell lead bags that can be used to protect film from X-RAYs. You can also find them online at Amazon, eBay and at online photo shops.

I just came across this advisory from the TSA,"Traveling with Film"

http://www.tsa.gov/travelers/airtravel/assistant/editorial_1035.shtm

Their advisory is contrary to my earlier thinking about packing the film in your checked luggage. To anyone who travels with film, please read the TSA advisory.

@Joe: Post those images here that we were discussing in the "Three Stripes" thread. They demonstrate what happens to films that have over-exposed to X-RAYs. They serve to show what happens when the films are exposed to X-RAYs or radiation.

Thanks so much for your help Tom & Joe.

I just ordered some lead bags with the intention of putting the film in the bag, and then in the checked baggage. I was going to tape a note to the bag with "photographic film inside - do not xray unprotected" in english and spanish.  In light of the TSA link that Tom posted, I'm not sure if this is a good idea or will only increase the chances of my bag being delayed?

I'm flying from LA to south america, shipping the film beforehand is a pretty costly option. If it were a domestic destination, I would just do that.

Hand inspection is probably the best idea, but my experience flying domestically is that it takes SO long. They must examine and swab every single pack. And then there are the officers who treat my Land camera like it's going to explode, and don't know the first thing about how to extend the bellows or open the back in order to inspect it thoroughly (to their credit, I'm sure they don't see many of those).

I have attached an example of what occurs when using the film after it has been exposed to x-ray.. Basically unusuable and most photos come out very poorly. The problem with darkness is due to me using an ND filter with an SLR-680.. Something which I don't think has been explained by Impossible on this site. IP need to display this information somewhere not to use an ND filter with this type of camera.

Thanks for that Joe. That is a pretty substantial change. Was that just once through the machines?

I am not sure as to where they were exposed or scanned so I cannot confirm how many times it went through the machine. I suspect only once, so this clearly shows how x-ray can completely ruin the Impossible Film.

Commentary on the IP ND Filter: the purpose of the ND filter is to allow the use of the PX600 and PX680 films in the original models of the Polaroid SX-70, SX-70 Sonar OneSteps, and the plastic-body Polaroid cameras that required use of the ISO/ASA 100 films. If you use 600-type films in a 100-type camera, all of the photos will be over-exposed. For people who want to use PX600 or PX680 films in an older SX-70 cameras, the filter is needed. But if you have a 600-clase Polaroid (like the SLR-680 or those that use 600 films), no ND filter is required.

Ive been using my film which came in the same package as my colleagues and it seems they are not affected as bad.. still get issues and most of the photos are washed out.

 I have attached two which have kinda developer ok but giving me some weird ghosting effects. The 2nd photo should have the camera you can see in the first photo. Its supposed to be the camera on a window seal with the window open.. very weird haha. Maybe this x-ray will create some new technique! My pack don't seem to have the cartridge spring appearing as much like my colleagues.

Both images are very light, owing to having been exposed to X-RAYs. In both photos, you can see an outline of something, but I can't make it out. It's clearer in the bottom photo.

Knowing that the film is exposed, let me suggest something: Cover the lens of your Polaroid camera (leaving the light sensor uncovered) and snap a photo. The camera will eject a frame that will have ONLY the effects of the radiation, and shouldn't have any photographed image. Be sure to shield the frame and let it develop for five minutes before looking at it. What does it show?

I suspect that the reasons why the films used by your partner are different from yours might be because the boxes of film in the shipment were packed in different orientations, and situated against different objects.