Microwave Kiln Paper Shelf Paper 3" X 3" 50 Sheets 50 Sheets 8cm x 8cm Cut the liner for the size of the inside of the kiln Kiln paper can only be used once it is make up of ceramic fiber material.and prevents the glass from sticking to the base of the kiln Place the glass on the kiln paper,cover the lid and begin to melt,Works Great in Microwave Kilns