COE90 Sheet Glass

Colored glass sheets are the starting point of nearly every fused or kilnformed project, and this category holds the Bullseye Glass Company COE90 sheet range at Art Glass Supplies. Every sheet is formulated to a coefficient of expansion of 90, and Bullseye tests its glass for compatibility within the 90 system, so these sheets are made to fire together. When you combine glass from different makers, test compatibility first.

What's in this category at AGS

The range is organized by color style and thickness. Opalescent 3mm and Transparent 3mm sheets are the double-rolled workhorses for single layers and fused stacks. Opalescent Thin-Rolled 2mm and Transparent Thin-Rolled 2mm sheets suit overlays, detail cutting, and lighter layered work. Iridescent sheets add a rainbow, silver, or gold surface shimmer, Streakies blend two or more colors in one sheet, Collage sheets carry fractures and streamers across clear or white grounds, and Special Production covers limited Bullseye runs.

Choosing a sheet

Opalescent sheets read as solid color and are the pick for opaque designs, tiles, and plates. Transparent sheets glow when light passes through, which makes them the choice for suncatchers, panels, and layered depth. Reach for 3mm when you want a standard single layer or the base of a fused stack, and 2mm thin-rolled when you want finer control over thickness and detail.

Compatibility and firing notes

Keep COE90 glass with COE90 glass through the whole project. Same-COE glass is made to expand and contract together, while mixing COE90 with COE96 or window glass can crack a piece on cooldown. Pair these sheets with COE90 frit, stringers, and dichroic accents to keep finished fused work inside one compatible system.