Jaap, back in October/November last year I shot HP5 that went through well over a dozen airport scans, in my carry-on luggage and the base fog is no different to my HP5 negs that haven't, the negatives all printed perfectly.

My Tmax 400 120 was scanned well over 18 times and that was all fine too. On some flights Chile-Peru for instance the hand luggage was scanned twice at Santiage airport and also on arrival at Lima.