[Jewelry making - Article 00057] - Re: [Orchid] Soldering without using Oxygen

[Martin Niemeijer]

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    Andrea, If you are using good burners, propane is very good for
    soldering and even melting small (50-100gr) amounts of gold and
    silver. Good burners are for example from Siever. They have a very
    good pencil burner of 10 mm. in diameter for propane. I usually use for
    this type for gold repairs . For bigger work you can use a 12-14 mm
    propane flame and for melting a 20 mm propane flameshould be enough. I
    found the oxygen burners to hot for very small and hollow gold work.
    For silver it is often handier to use propane and oxygen, due to the
    heat conductivity of silver. Also you can use a reducing flame of an
    oxygen burner (give lower amount of oxygen) and prevent so staining of
    silver. And for melting is oxygen faster. but you can easy overheat
    the melt and burn out low melting alloys. But sometimes i use a lot of
    oxygen to burn sjit out of gold alloys. 

    However it is a bit of habituation what types of burners you will use
    after a few years if you have both types. I use mostly the 10 mm
    propane and a 0.2 ,1.5  and 5mm oxygen/propane burner. 

Martin Niemeijer

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