There were numerous Kodak films that were available in both amateur and professional versions, and some that were/are professional only. The difference is that amateur film was shipped out from the factory with the expectation that there would be a time lag until used by a photographer, so the film would reach it's "peak" later. Professional film is shipped at its peak and is expected to be refrigerated until used, pros being more sensitive than amateurs to such variations in film. Pros need consistent results. Some would go so far as to test a new batch of film, then use filters and development settings for the rest of the batch, going so far as to try and get more film later of the same batch if possible. On Feb 18, 2012 9:56 PM, "Don Williams" <dwilli10@xxxxxxx> wrote: > At 04:50 PM 2/18/2012, you wrote: > > According "The frugal photographer" page, it is safest to assume a > film should be used within one year of being removed from a freezer. I > have used expired RSXII slide film; > > > Does anyone remember the specific Kodak film (marked Professional > something, I believe) that was kept in a cooler at the photo stores? > > DAW >