Fuse It! 1 Lb Bullseye Coarse Transparent Frit - 90 Coe - Aqua Blue By Stallings Stained Glass Made from crushed, screened, and magnetically cleaned Bullseye Compatible sheet glass. 90 COE. Frits are versatile and can be used in:  Pte de verre and kilncasting  Kilnforming, including glass sketch and painting with light techniques  Torchworking and blowing, to create colors and patterns on surfaces. In application, color saturation may vary. Thin layers may be lighter in color. Thicker layers may be darker and more saturated in color.