Wissmach Sapphire Blue Tr/Garden Green Tr (color code 96-62) is a Prisma blend in COE 96 kiln glass, blue and green streaks in a 3mm sheet, tested for fusing compatibility.
Appearance Vertical ribbons of sapphire blue and leafy garden green run the length of the sheet, blurring into teal where they meet, with the colors passing light like sun through water weed. Prisma is Wissmach's blend of two or three colors in one sheet, and the first color in the name is the more dominant, so the blue leads with green threading through it. The streaking is unique to each sheet, so no two are identical.
Striking Wissmach notes that its Opaque and Prisma colors may strike to a deeper or denser color after firing, so plan on the fired sheet coming out a little richer than it looks unfired. Fire a sample chip first if the exact depth 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 This blend is a copper bearing color on Wissmach's COE 96 chart. Fired in direct contact with a sulfur bearing color such as String of Pearls, Oyster Pearl, Gold Tone, Honey or the red and orange family, it can form a darker reaction line where the two glasses touch. Test the pairing first, whether you want the reaction 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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