ThinFire Shelf Paper is intended for single use at temperatures up to 1500ºF (815ºC). Place the rougher, printed side of ThinFire against the shelf and the smoother, plain side against the glass. Firing glass against the rougher side may result in residue clinging to the glass. Cleanup and Safety After firing: ThinFire will be reduced to a fine layer of ash. As with all ceramic fiber material, avoid breathing its residual dust. Use a HEPA-filtered vacuum to remove ThinFire from the shelf.