In reply to Henry Iddon:
> I know - the comments made me chuckle.
I didn't think they were too bad!
Incidentally I have done tests with x-ray baggage scanners and Ilford HP5+ (rated at 1600). No fogging. However, that assumes a particular type of security scan (the conveyor hand baggage scan that you see in airports). I can certainly fog film with a different type of scanner in which the bag is exposed to x-ray for a longer time. I don't doubt that it would be the same for Tri-X