Originally Posted by
Dennis
Silver solder should flow within a minute or two, or you will need more heat. Also the piece needs to be heated overall by moving the flame around, before homing in on the joint.
Prolonged ineffectual heating burns out the flux and changes the solder alloy.
The common flux in jewellery making is borax in water.
Remember also that you are not restricted to hard silver solder. For a large metal instrument, you will be greatly helped by using easy, or extra easy hallmarking quality silver solder. Dennis.
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