Bullseye Dark Amber (style 001138) is a 90 COE fusible glass sheet, a transparent color for fusing, slumping, and kilnforming. As a striking color, Dark Amber may not reach its final shade until it is fired.
Cold characteristics Varies slightly from lighter to darker.
Working notes A sulfur glass. May have dark interface reaction with copper-bearing (001116, 001408, 001417, 000116, 000144, 000145) and lead-bearing (001311, 001215, 000301, 000305) glasses. Learn more about possible reactions by reading our Reactive Potential of Bullseye Glass chart.
Reactions This is a reactive glass. It contains Sulfur (S) / Selenium (Se) and may react where it meets Copper (Cu), Lead (Pb), and Silver (Ag), 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 · 3mm Iridescent Sheet · 2mm Iridescent Sheet · Frit · Ribbon .
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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