Wissmach Irish Green Transparent with Luminescent coating (base color code 96-343) is COE 96 kiln glass, a light spring green 3mm sheet with an iridescent surface, tested for fusing compatibility.
Appearance A pale spring green wrapped in a strong mother of pearl sheen, with soft yellow green and powder blue bands drifting across the sheet. The rainbow shimmer swings as the glass tilts and shows in ordinary room light, no special lighting needed.
Luminescent coating The Luminescent coating lays a mother of pearl shimmer over the light green base, drifting through yellow green, aqua and powder blue 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 glass is Irish Green, 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 Yellow, it can form a darker reaction line where the glasses meet. Run a small test tile first if the pairing matters.
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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