Wissmach Sea Blue Transparent/ Crystal (color code 96-45) is a Prisma blend in COE 96 kiln glass, turquoise blue with pale crystal ribbons in a 3mm sheet, tested for fusing compatibility.
Appearance A bright turquoise-leaning blue with paler crystal ribbons running the length of the sheet, opening lighter channels through the color. A lively scatter of seeds and small bubbles catches the light, typical of handmade rolled sheet. Sea Blue is the first color in the name and the more dominant, and the streaking is unique to each sheet, so no two are identical.
Striking Wissmach's Opaque and Prisma colors may strike to a deeper or denser color after firing. Plan on the fired piece reading a little richer than the raw sheet, and fire a small chip first when the exact shade matters.
Working notes Wissmach’s recommended full fuse schedule for a 6mm project made from two 3mm layers: heat at 300 degrees F per hour to 1225 F and hold 30 minutes, then 600 per hour to 1460 F with a 10 minute hold, cool as fast as the kiln allows to 960 F and hold 1 hour, then 100 per hour down to 700 F. These numbers come from Wissmach’s current published firing guidance. They are guidelines, not guarantees. Kilns differ, so fire a small test piece first.
Reactions Sea Blue is a copper bearing color on Wissmach's COE 96 chart. In direct contact with sulfur bearing colors such as String of Pearls, Oyster Pearl, Honey or the red and orange family, it can form a darker reaction line where the glasses touch. Test the pairing first, whether you want the line or want to avoid it.
Format and sizes Sold as a 3mm sheet in 8" x 10.5", 10.5" x 16" and 16" x 21" sizes. Choose your size from the options on this page.
Fusing and compatibility Tested compatible with other Wissmach COE 96 kiln glass. With glass from other makers, a matching COE number alone does not guarantee compatibility, so fire a test tile before committing a project.
Helpful downloads Wissmach COE 96 Kiln Glass Catalog
Technical data courtesy of the Paul Wissmach Glass Co.
Description updated: August 13, 2026
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