We had a customer take paper home to Norway - it was put in checked baggage, not carry on. There was a very interesting result from the unintentional experiment.....
In the case were packs of Ilford Multigrade FB Warmtone and Adox Fine Print Vario Classic. All the Adox was fogged by the Xray, but the Ilford was not affected at all.
But nobody should take this as a recommendation to send ANY light sensitive materials through checked baggage - it's never a good idea!