Sil/Phos is a 15% silver phosporus brazing. It is used for
Refrigerant lines. The copper lines have to be heated to nearly
red hot to braze with sil/phos. I don’t think it would have any
Jewelry applications. Also when used with copper it is self
fluxing and can be used to fill gaps .
In jewelry work the quanities of gas used and the smallness of
the work are more forgiving than larger jobs with respect to
gases. They should have more respect for the potentials