It's true that the Benzotriazole might cut some fog, but restrainers in film developers are pretty touchy. Without being able to test various procedures, developing with regular Xtol, with say 25% greater time, might be a good thing to try, but I'm curious about other recommendations. On Wed, Feb 2, 2011 at 10:20 PM, janet ness <nessj@xxxxxxx> wrote: > I have a student in my darkroom class who will be bringing in to develop a > roll of Plenachrome 120 film that was in an old box camera he just > purchased. Since this film is 50 years old or more, I expect it is fogged. > Would it help to add some Benzotriazole solution? I have some on hand and > the container says that it is used for paper, but could it help the film? > We have no idea how long to develop the film in Xtol, but I expect we can't > overdevelop it. We don't expect this film will yield much, but what the > heck, we have to try. > > Janet Ness > >