Laguna Flame Ware is an advance clay body formulated to resist the shock of an open flame and have exceptional heat retaining properties. Great for gas /electric ranges, ovens, broilers, barbeques, microwaves and more. Firing range of cone 5-10.   Bisque/Firing: Once clay is bone dry, bisque to cone 05 (1888 F°). Glaze fire to cone 5 (2,167 F°). Higher firing ranges are possible up to cone 10 (2,345 F°). Do not glaze  the bottom inch of vessel. Burnish cooking area smooth or glaze to create a non-stick surface.