Easily add intricate designs to glass. Glassline pens are a coating and shading material for glass. They are easy to use and can be applied between multiple layers of glass or on the top surface for a complex dimensional look. Glassline pens can also be sprayed for subtle shading variations. Glassline is compatible with COE 90 and System 96 glass. Glassline pens are lead-free and food safe. 2 oz. bottle. Use with 3 tips (item #80216). Glassline Tip: For best results, "tack fuse" individual sheets of glass before stacking the entire fuse. It is best to shoot at 1500 F., but can be shot lower or higher depending on desired results. For more tips and instructions, click "View user manual". Glassline pens should be stored with the caps firmly in place, and are best stored at room temperature. Pens that have been frozen or exposed to high temperatures may require additional mixing to ensure proper consistency. Christmas plate created by artist Delphi Steena Gaut. Stocking ornament by artist Gillian Hulse. From the book "Kiln Formed Glass" #9221.