Wissmach Clear Transparent (Wissmach’s name for it is Crystal, color code 96-01) is COE 96 kiln glass, a water clear 3mm sheet tested for fusing compatibility.
Appearance Clean and colorless with high clarity, with only the scattered fine seeds typical of handmade rolled sheet. It disappears over any color placed beneath it, which is exactly the job of a good clear.
Working notes This is the workhorse of a COE 96 studio: use it for capping colors, building base layers, extending a project without shifting its palette, and stretching more expensive colors further. 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 are guidelines from Wissmach’s current published firing guidance, so test fire in your own kiln first.
Reactions Crystal is not flagged on Wissmach’s COE 96 reactive chart. It sits next to any color in the line without forming a reaction line, which is one more reason it works everywhere.
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 in a thin 2mm sheet and with a Luminescent coating .
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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