Bullseye Steel Jade (style 000345) is a 90 COE fusible glass sheet, an opalescent color for fusing, slumping, and kilnforming.
Cold characteristics Uniform color.
Working notes At tack fusing and slumping temperatures, the surface frequently develops a metallic gray film, similar to effects with Steel Blue Opalescent (000146). This may disappear at full fusing temperatures. Cap with clear to ensure a consistent opal green through the clear layer. To maintain the metallic effect, extend hold times at tack fusing or slumping temperatures. The metallic layer may develop anywhere where 000345 is exposed and can change over the course of multiple firings. It ranges from a thin glossy gray, to a thicker, matte metallic. A yellow residue on shelf releases such as primer and Thinfire may occur when firing to a full fuse or hotter. Scrape & apply fresh primer, or remove used Thinfire and replace with new to avoid possible contamination in subsequent firings. The exposed surface of 000345 has greater sensitivity to items such as glass cleaner, marker and Glastac. Traces of these liquids, which often fire cleanly, may be visible in fired works, even when wiped away before firing. To minimize this effect, reduce the contact time between the glass and possible contaminants. Also, avoid using Glastac on the surface.
Reactions This is a reactive glass. It contains Copper (Cu) and may react where it meets Selenium (Se) / Sulfur (S), Reactive styles (000009, 001009, 001019), 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 Thin-rolled sheet, 2mm, with a rolled edge. The thinner sheet is ideal for overlays, fine detail, and controlling stack thickness. 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: 3mm 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
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