[ChrisPlatt]

Unexposed faster film tends to fog over time.
I recently gave away some Tri-X one year past its expiration date.

I keep only slower outdated film, and then under refrigeration.
Currently the only expired film I have is some bulk AGFA APX100.

Chris

[sconut1]

What I've heard and an opinion... B&W film ages gracefully, especially if kept under refrigeration. I recently came across a post where a photographer came across a roll of Kodak Plus X Pan from the late 60s. Results were not horrible, but not wonderful either. No data on how the film was stored, but I'd assume not well. In my opinion, it attests to how well B&W film ages. The Kodachrome.. not so much. You cannot get it developed anymore, unless you choose to treat it as black and white film. You could shoot it and send it for B&W processing or do it yourself if you so choose, but I think its a waste of time given the cost of a new roll of llford 400. For all but the die-hards...Kodachrome is essentially useless these days. .I personally wouldn't bother with it.