Save time and avoid brush stroke marks. Use thin shelf paper instead of shelf wash for an ultra smooth finish on the back of your fused piece. One time use. Measures 20-1/2" x 20-1/2". 25 pieces per pack. Popular Bullseye ThinFire Shelf Paper doesn't shrink in the kiln and features a printed pattern of the Bullseye logo on the bottom side, as shown below. The logo pattern does not affect glass or kiln shelves. Nor does it change the way ThinFire works in any way. But it does provide two benefits: One, the pattern makes it easy to recall how ThinFire should be positioned in the kiln. Just remember, logo side down against the shelf; plain side up, against the glass—to create the smoothest, cleanest-possible finish for your work. Two, the pattern serves as an assurance that Bullseye ThinFire is tested, tried and true.