testing papers

[tenderobject]

hey guys! recently i managed to get a few enlarging papers from tehran. ilford ilfospeed RC1, old agfa brovia and orwo papers. i would use this for contact printing and paper negatives. although they seem old and wasn't properly stored. it would be better to know if these papers are still good. are there any quickest ways to check papers for fogging, etc? what is your process? thanks!

[polyglot]

Process a sheet without exposing it. Does it come out white or with any darkened/fogged patches on it? There's your answer.