That wisdom is based on industry research done for FAA, and the scanners have become even more film-friendly since then!
Quote Originally Posted by wiltw View Post
Kodak's published wisdom:
  1. With film of ISO 400 and less, the carry-on baggage scanner is safe for multiple passes of the film thru scanner
  2. With film of ISO 1600 and higher, try to get your film hand inspected (which NEVER WORKS in London Heathrow airport!!!!)
  3. NEVER EVER put your film thru checked luggage, which is put thru a CT Scan which will ruin unprocessed film