Wissmach Hunter Green and Blue with Luminescent coating (base color code 96-34, a blend Wissmach lists as Crystal/Olive Green) is COE 96 kiln glass, a 3mm Prisma sheet with an iridescent surface, tested for fusing compatibility.
Appearance The base is a muted, mossy green streaked with soft blue, and the coating pulls vertical bands of lavender, aqua and pearl across it that shift as you move around the sheet. The rainbow effect shows in ordinary room light, no special lighting needed. As a Prisma blend the streaking is unique to each sheet, so no two are identical.
Striking The Prisma base underneath may strike a shade deeper or denser after firing, as Wissmach notes for its Opaque and Prisma colors. Plan on a slightly richer green and fire a sample chip when the exact tone matters.
Luminescent coating The Luminescent coating lays a mother of pearl shimmer over the mossy green and blue base, drifting through lavender, aqua and pale gold as the light and viewing angle change. The coating is a low fire surface layer and it is heat sensitive. Fired face up, heat and oxygen can burn it away. Wissmach recommends reverse fusing with the coated face down on a flat kiln shelf and keeping the top temperature at 1400 F or below. Do not cap the coated surface with clear glass, capping makes the coating disappear. Keep any later firings below 1250 F. For a full fuse with two 3mm layers, Wissmach’s Luminescent schedule runs 400 degrees F per hour to 1225 F with a 30 minute hold, then 600 per hour to 1400 F with a 10 minute hold, cooling as fast as the kiln allows to 960 F for a 1 hour hold, then 100 degrees F per hour down to 700 F. Results vary sheet to sheet, so test fire a small piece first.
Reactions The base blend is copper bearing on Wissmach's COE 96 chart. In direct contact with sulfur bearing colors such as String of Pearls, Oyster Pearl, Honey or Yellow, it can form a darker reaction line where the glasses touch. Test the pairing first when it matters to the design.
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.
More of this color Also available without the coating (plain sheet) .
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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