Evaluation sample (4" x 4") . . . Try it out for $1.00 before you buy in quantity.Industrial quality kiln shelf paper great for higher temps (or lower too). Rated to 2300 degrees Fahrenheit. 1 mm thickness (about 1/16"). Kiln shelf paper prevents your work of art from fusing to your kiln or microwave kiln platform.Photo 3 shows a bit of glass I slumped using this paper. Photo 4 shows the same paper after melting the glass at 1600F.Photo 5 shows the underside of the slumped glass.Although this is single use paper, I have found that it can often be used several times.I use this paper for my own projects, and have found it to be very reliable.Of course, use sensible precautions when using and disposing, andalways test the paper on a sample before firing your precious project.