Making a exothermic welding connection Make sure the mold is dry, by pre-heating, put the cleaned conductors in mold.Place metal disc in bottom of mold crucible and close the mold.Dump welding powder into crucible, and place starting powder in the ignition pocket.Close lid, ignite the starting powder with the flint gun.Reaction takes place in the graphite mold.Open the lid when it is cold. The welding connection is done. Notice First, develop the correct mold according the conductor and the connection way, also provide the matched welding powder. Second, before welding, clean the conductor. Third, pre-heating mold. Forth, in the welding operation scene, no inflammable articles within 2 meters distance. Fifth, the operator must wear gloves. Sixth, clean mold after welding finishing, for next connection. Seventh, molds should last for 50-80 welds if proper care is given.