Pre cut 10cm squares of kiln fibre paper also known as bullseye thinfire paper which protect kiln shelves from fused glass during firing the paper withstands temperatures up to 815c use pieces of kiln fibre paper to create shapes between two pieces of fused glass the paper will disintegrate during the firing to leave a relief shapeif your glass piece features a hole eg for hanging a pendant stuff it with kiln fibre paper to prevent it from fusing over kiln venting is necessary when u