Quote Originally Posted by Bob-D659 View Post
Well if one of the developer bottles is closer to black instead of clear, it's dead. The clear fixer part of the blix will throw sulfur if it's dead.
That is pretty much all you need to know about the chemicals, but there is a good chance the developer will be fine if unopened. Liquid fixer is weird; sometimes it see to last forever and other times it goes bad over one season.

But I would bet the paper is a loss. Maybe freezing would let it keep that long. I never had much luck with color paper beyond a few years even when refrigerated.