Does anyone out there have any working, or technical knowledge as to the working lifespan of unopened Technidol? I've got about 20 packets unopened that I'd stocked up on 8-10 years ago, but have no expiration dates on the packets nor the boxes. Unfortunately I've only got 3 rolls of techpan. So, if anyone out there is interested in some Technidol, possibly in trade for some film? Or, if anyone has some Techpan they'd like to unload...? But, really just wondering if this stuff is still usable. Given experience with other developers I assume it should be, but I'd like some input.