Wissmach Bright Yellow (color code 96-2 D) is COE 96 kiln glass, a sunny streaked yellow in a 3mm sheet, tested for fusing compatibility.
Appearance A warm lemon yellow with paler cream ribbons drifting horizontally through the sheet, more streaked wash than hard stripes. The lighter trails soften the color and keep it from reading flat. The streaking is unique to each sheet, so no two are identical.
Striking Bright Yellow may strike in the kiln, per Wissmach's note that its Opaque and Prisma colors can fire deeper or denser. Expect a slightly richer yellow after firing, and fire a sample chip 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 Bright Yellow is a sulfur bearing color on Wissmach's COE 96 chart. Fired in direct contact with copper bearing colors such as Reactive Blue, Deep Sky Blue, Turquoise Green or Sea Blue, it can form a darker copper sulfide line where the two glasses touch. Run a small test tile before committing the pairing to a project.
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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