Whatever you do, don't put your film in checked luggage. Many airports use the new CTX5000 scanners. These machines will give a low dosage scan to the entire piece of luggage. If there is any suspicious object, they will then rescan that object with a high intensity beam. It is this beam that does the damage, and generally shows up as a strip about 1cm wide. A few rolls of film will not usually attract attention, but a large quantity, such as a brick, will have enough metal (the silver in the emulsion), that it attracts the high intensity beam. This beam is strong enough to damage even slow films and papers.(posted 8290 days ago)David Carper ILFORD Technical Service