peters said:
Brought all the stuff up stairs and proceded to test Tri-x,HP-5 and J+C100. Didn't really wait too long for the film to defrost. After initial development of the three films the only one that did not have dichroic fog was the Tri-x. The other two crapped out on me. I guess the one to use in extreme conditions is the Tri-x. Curious if anyone else has had any experience with this??
regards Peter
I've seen lots of images shot in Arctic conditions with a variety of films, and never heard of this problem. What you might have, however, is condensation or even sublimated rime ice on the film surface leading to irridescence in the gelatin that resembles dichroic fog. Otherwise, dichroic fog is usually related to using a too-solvent developer without correct compensations for the film emulsion type (the more modern the emulsion, the more prone to dichroic fog in highly solvent developers of the older types). I don't see film temperature at exposure time as relevant; the film will come up to developer temperature in a fraction of a second when you pour in the liquid, so film temperature overall isn't relevant unless you had condensation on the film.
You don't, however, say what developer process you used -- that would say a lot more about a dichroic fog problem.