there's a tremendous mythology floating around out there about what will and won't affect IR film. You can't shoot HIE at night (not any better than a comparable-speed panchro film). Unless the tank you're using to process HIE leaks light onto regular film, it won't fog HIE either. It will survive in similar conditions to regular b/w film- i.e. you don't have to keep it refrigerated until 20 mins before you shoot it, and then transport it like a donated organ back to the lab. I found a roll I had shot over two years prior, that had been put in a desk drawer in an un-airconditioned house (the room in question would get over 90 F for most of the summer). I processed it, and everything was printable and within normal contrast and exposure times for other HIE stuff I had done following more cautious and prudent film handling procedures. I also took some HIE to Cambodia with me, and had to let it go through a number of x-ray machines on the way to and from. No x-ray fog. My favorite HIE myth was that you had to process it in a separate tank from your other b/w film because the IR radiation would contaminate your other film. What a load of horseshit.