Bullseye Robin's Egg Blue (style 000161) is a 90 COE fusible glass sheet, an opalescent color for fusing, slumping, and kilnforming.
Cold characteristics May have a dappled surface.
Working notes A copper glass. May have dark color reaction at interface with cadmium/selenium or sulfur glasses including 000125, 000120, 000126, 000137. May have a red-hued color reaction with Reactive glasses such as 000009, 001009, 001019. Tests fired to a full fuse indicate that Robin’s Egg Blue Opalescent reacts visibly & with an intensity similar to 000216. Learn more about possible reactions by reading our Reactive Potential of Bullseye Glass chart.
Reactions This is a reactive glass. It contains Copper (Cu) and may react where it meets Selenium (Se) / Sulfur (S), forming a visible line or halo at the boundary. Use that on purpose to outline and add depth, or keep reactive colors apart to avoid it.
Format and sizes Double-rolled sheet, 3mm standard thickness, with a rolled edge. Available in the sizes shown above.
Fusing and compatibility Tested compatible with other Bullseye glass. When you combine it with glass from other makers, matching COE alone does not guarantee compatibility, so fire a small test tile first.
More of This Color The same Bullseye color in other forms: 2mm Thin Sheet .
Helpful downloads What to Expect from Bullseye Glass (PDF) · Reactive Potential of Bullseye Glass (PDF)
Technical data courtesy of Bullseye Glass.
Description updated: July 7, 2026
Spot an error or have feedback on this description? Report it here .
