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All glass orders are shipped at cost.
About Fusible Glass Fusion Headquarters carries a complete line of fusible glass and glass fusing supplies including fusible or compatible glass. Whenever two or more pieces of glass are fused together, it is important that they are “compatible” with each other. We consider different pieces of glass to be compatible when they have exactly the same amount of expansion (when heated) and contraction (during cooling). This article is continued at the bottom of this page. |
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90 COE Sheet Glass
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 Standard Thickness Sheet Glass |
 Standard Thickness Sheet Glass |
| 1mm Stringer 2mm Stringer Confetti Frit Rods |
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90 Frit 90 Noodles 90 Stringer |
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If they are not the same, the glass that contacts more will actually break away from other glass. The common units of measure is the Co-efficient Of Expansion (COE) or linear expansion co-efficient (LEC). Talking about the COE of a glass is a way to talk its compatibility. Although it is not a perfect way to describe all of the subtle variations and behaviors of glass being heated in kiln, it has served us well since we started using it in 1981. COE refers to the percentage of change in the length of a piece of glass that is heated. Fusing glass should all have the same COE to avoid breakage caused by mixing incompatible glass. A piece of 90 COE Bullseye compatible fusible glass is chemically designed to be compatible with any other piece of 90 COE Bullseye compatible fusible glass. It doesn’t matter if it is fusible sheet glass, Iridized or thin, fusible frit, stringers or noodles. Although Bullseye glass Co. prefers that you don’t call their glass 90 COE. The terminology they prefer is “Tested Compatible.” Personally we have never had any problems fusing Uroboros 90 with their products. Bullseye glass is manufactured by Bulleye Glass Company, Portland, OR.
The concept of compatibility holds true for all types of kilnforming or kilncasting activities. It doesn’t matter if you are using glass rods, frit, stringers, dichroic glass, noodles or sheet glass. All of the pieces of art glass used need to be compatible with each other.
We group or fusible glass by either 90 COE or 96 COE. The same holds true for System 96. Fusing COE 96 with another piece of 96 will work. Spectrum and Uroboros both produce glass products with a COE of 96 (S96) that are designed to be compatible with each other. These are different than the stained glass or tiffany glass lines that they produce. Just because a piece of glass is made by Spectrum doesn’t necessarily mean that it can be used with fused glass from the System 96 line.