Note that the instructor is using rosin cored solder wire which includes a flux. Flux is necessary to clean the area of the join and facilitate the smooth flowing of the melted solder.
Most soldering guns and irons are used for soldering electrical wires together which requires less heat.
How to use a soldering gun for jewelry.
Solder can contain lead so be sure to wash your hands thoroughly after handling it.
If you cannot melt the metal you will not be successful.
The solder will follow your heat so try not to point the flame right at the solder.
Soldering irons get really hot think and solder itself is molten metal.
It also has a hydraulic mechanism for moving the solder wire from the secondary winding to the solder tip.
In simple terms a soldering gun comprises a soldering mechanism for melting with solder wire.
It melts at 3950f and can be used with a soldering iron or torch.
Use it to solder aluminum aluminium to itself and to other metals.
Those tools simply do not get hot enough to melt larger jewelry metals.
Paste or liquid flux is not suitable for electronics.
Instead you want the flame to draw the solder through the joint being connected.
Flux needs to be purchased separately.
Soldering requires that you melt bits of metal onto metal.
Once the solder is in place its time to start up your torch.
Flux for soft soldering choose from harris stay clean flux and the staybrite soft solder kit.
All this operated through a trigger button press.
Better still use protective gloves.
Be sure to wear safety glasses keep loose clothing and hair out of the way and be careful with your fingers.
First all the metal should be heated so that the temperature for soldering is reached at the same time.
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