In reference to 20lb Bond Ink Jet paper, a shelf life can be determined based on the environment it was stored. If the material was stored in a mild, dry environment, and wrapped in plastic sleeves w/ core ends, I cant see why not. If you look at the end of the roll and see wrinkling/warping of either the core/paper don't bother. The Bond rolls are cheap enough if you have any doubt. Luckily the 20lb is thin enough to not take shape to the roll. Unravel a few feet, and if the material doesn't stick together and you checked what I mentioned above, it's fine. Let me know how you make out.