The Glassline Bubble Pens are used as a lining and shading material for glass. They're simple in design and easy to use. Glassline Bubble Pens are designed to be applied between layers of glass. When sandwiched between glass, the lines will develop a colored line made up of many micro bubbles. Glassline Bubble Pen colors are compatible with most types of glass from Float to 90 and 96 COE. Glassline colors are best fired to 1500 degrees F., but may be fired lower or higher depending upon desired results. Glassline Pens are lead-free and food safe when fired. 2 oz Bottle.
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