I got some unused 8x10 fiber and rc paper from Adorama. I bought these about 9 months ago and since then it has been stored in a cool dark closet. I was going to order some paper today but I'm unsure if I need more at this size. I don't know if it is expired or not because I don't know the expiration date. I'll probably try some out anyways just to be sure but what's the typical expiration for these things?