Tomato Red Opalescent, Fine Frit, Fusible, 1 lb. jar Frit Made from crushed, screened, and magnetically cleaned Bullseye Compatible sheet glass. Frits are versatile and can be used in: • Pâte 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.