Grip wire securely in cross lock soldering tweezers. Ignite the torch and heat the bottom 1/2″ of the wire. As soon as the wire begins to glow, move torch underneath the wire so the tip of the flame touches the end of the wire. The wire will become molten and a ball will start to form. When the ball measures about 2-3mm remove torch and quench wire. Be sure to work over a fireproof surface, as it is possible that if you overheat the wire the ball may drop off the end. If this happens just repeat the steps to ball the wire. There is no need to pickle the wire at this time.