I've heard many times about the old trick of loading two strips of film back to back in a single stainless reel. Today, loading film for the first time (since returning to photography 3 years ago) outside a changing bag, I tried it. I had no problem getting the two rolls of 120 back to back into the stainless reel (in fact, did it twice, to fit four rolls in a quart size stainless tank), and the development of the images (in slightly stronger developer than I usually use with 120, because I now had the same amount of film in the tank I'd have with 35 mm) was excellent, but I found, when I opened the tank, than the backs of the two rolls had contacted each other -- on one reel, for most of the area of the films -- and as a result, the blue (antihalation?) dye in the TMY didn't come off in the developer and fixer to the extent it usually does. I was able to remove the dye by rerolling the film singly onto stainless reels and soaking it in a bath of sodium sulfite and sodium carbonate, as I do after tube developing sheet film, but this is a significant pain with roll film, and I can't see this trick ever having been a time saver for a photographer if it required this kind of extra handling. So -- is there a special trick to keeping the two rolls from "protecting" each other's base sides, or is this a trick that should only be done with stiffer 35 mm stock (which seems likely to present developer capacity issures), or am I just missing something?