This test was carried out to see whether different writing materials have any effect on glazing. The materials tested were pencil, felt tip, ballpoint pen (biro), Sharpie, and gel pen. The results showed that both pencil and Sharpie caused imperfections in Stroke & Coat and Hobby Colorobbia clear dipping glazes. For this reason, we recommend testing any writing material before using it, as this can help prevent glaze defects and avoid the need for unnecessary re-firing. Different writing materia