Paragon's exciting MagicFuse kiln fires glass inside a microwave oven. It reaches glass fusing temperatures in only minutes! This is the perfect way to introduce yourself and your loved ones to the amazing world of glass fused jewelry. Create stunning jewelry that your family and friends will treasure. Experiment with the huge selection of glass colors available from your local stained glass supplier. And, unlike the competition, the MagicFuse is made in America from high temperature ceramic fiber. Place the kiln inside a microwave oven and turn on the power. The kiln will reach 1500°F (815°C) in about 5 - 8 minutes. (Firing time depends on the wattage and brand of the microwave oven.) Firing the MagicFuse requires skill. Because the kiln fires so rapidly, glass pieces should be limited in size to 2 layers of 1 ½" x 1 ½" or smaller. Larger sizes or additional layers of glass must be pre-heated for 5 minutes at a 50% power setting on the microwave. Otherwise the glass will break. Annealing in a separate kiln is unnecessary for small glass pieces such as earrings and small pendants. The glass must also be free of glue, grease, and fingerprints. The rapid firing of these contaminants can cause the glass to break. Firing times may vary from one firing to the next even within the same microwave oven. The firing times vary between sizes and brands of microwave ovens, and a MagicFuse kiln that is still warm from a previous firing takes less time to fire than a cold kiln. For these reasons, don a pair of safety glasses and visually check the glass a minute or two before it is done. Then fire longer and check it again. Remove the MagicFuse kiln when the glass has fused just the way you had envisioned. The glass begins to fuse during the last 30 seconds of firing. This is why you should visually inspect the glass to obtain precise fusing results. The MagicFuse requires a microwave oven, which is not included.Paragon