What to expect from 10-year-old Fuji EI 100/1000?

[j-dogg]

Exposed at 100 ASA

 

[StoneNYC]

Exposed at 100 ASA

If it wasn't frozen? 1 stop loss for every 10 years as a general rule.

So if it's originally 100ASA, shoot it at an EI of 50.

If you already shot it, test a sheet and develop - push one stop more and see how it looks.