Glassline Pens are used as a lining and shading material for glass. Simple in design, easy to use, can be thinned with water. A metal tip set is recommended for fine line drawings on glass. Can be applied between multiple layers of glass or on the top surface for a complex dimensional look. To further explore your creative edge, Glassline colours may be sprayed to achieve subtle shading variations on glass. They are compatible with most types of glass from Float to 90 and 96 COE. For best results "task fuse" individual sheets of glass before stacking your full fuse. Lead-free and food safe when fired. 2oz bottle.