Two Sheets of Bullseye Fibre Paper This listing is for 2 sheets of 15cm x 30cm Bullseye fibre paper - one sheet is 1.6mm thick and the other sheet is 3.2mm thick. It can be used as a shelf separator and helps prevent bubbles between the shelf and the glass while providing a smooth base for your work. It can be used as a dam and insulates against thermal shock and improves annealing. It can also be used for creating bas-relief texture and design in your work, simply cut to shape and place under your glass before fusing. Ideal also for creating jewellery - cut into thin strips and place between two pieces of glass to create preformed holes that run through your glass.