Opals Designer Fusible Glass Coarse Frit Mix - 4oz - 90COE - Made From Bullseye Glass This fusible glass frit is 90COE; 4oz package. Artist designed and inspired. Made from crushed, screened, and magnetically cleaned Bullseye Compatible sheet glass. Frit is versatile and can be used in: Pte de verre and kilncasting; Kilnforming, Torchworking and blowing, to create colors and patterns on surfaces; full-fusing, tack-fusing and much more! ARTIST'S TIP: To lighten the effect of frit mixes and to separate the pieces so the individual colors may be more easily seen, mix with Crystal Clear or Clear Coarse Frit in a 3-to-1 or 4-to-1 ratio and full fuse. Please note that some frit may strike, or change color, once it's full fused. Please note that some frit may strike, or change color, once its full fused.