Description Fiber Board 1”x12″x12″ Temperature Rating 2300 F, Density 16 lb./cu.ft, 1″thick. Great for mold making and fused glass. Before you use your fiber board for the first time, you will need to burn out the binders that hold the ceramic fibers together. Place your fiber board on the floor of your kiln, prop the kiln lid open about an inch and follow this firing schedule: Segment 1: Fire at 600° per hour to 615°F Hold for 60 minutes Segment 2: Fire at 600° per hour to 1215°F Hold for 60 minutes Turn off kiln and let temperature fall on its own These binders will have a sharp, burning odor, so be sure to ventilate the room well.
