When I acquired a 4x5 LF camera set about two years ago, quite a few film holders have film inside. 1/2 of them are T-max 400 and 1/2 are Velvia. 3 of the T-max holders show dark side of the dark slide. So I processed one of the films, stock D-76 at 8:20 min at 68F. But the film came out to be clear. But it shows fog off center and the holder holder lips show up as grey border on the negative. So clearly the film was not exposed properly, or not even exposed at all. The film was in the holder for at least 2 years and probably even longer. So I just wonder how long the film can stay inside film holder and not fogged. The holders stay at dry basement most of the time. Here is the film scan. There are dark wash marks.