Response to Developing an expired Kodak recording

I take it this is Kodak 2475 recording film?
That stuff hasn't been made for 'yonks'. It's going to be fogged, full stop, from chemical deterioration, and from exposure to background radiation and cosmic particles. Nothin' much you can do about it. Maybe rate it a LOT slower, and develop it with some added restrainer in the dev.
I bought a whole batch of close dated 2475 myself some years ago. It was disappointingly short of its 10,000 EI claim, in fact nowhere near. I don't even think it was a true 1000 speed. I ended up chucking it away after a couple of years because it just got foggier and foggier.
As the above post said, if you want a fast film, your best bet is P3200. That looks like it has a true ISO rating of about 1200. (Unlike Neopan 1600, which is just a 400 speed film in a box with 1600 printed on it!)

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