One never knows... I'd be trying one first before I assumed they aren't any good - ripped wrappers aside, of course. I have successfully printed on paper that was stored in a basement since its 1946 expiration date and used film that went belly-up in 1963. If you have a camera and holders, try one out. If not, try doing a pictogram with some object on the plate under the enlarger and flash it for the shortest time possible at the smallest aperture available.