i have a ring in the works. a 2 toned ring. 1/2 is 18kt gold, 1/2
is silver. everything is cut out, filed, emeryed etc, but my
dilemma? what kind of solder to use? should i use 18kt yellow or
silver hard solder?
I have done a lot of work with gold-lined silver. You must use
silver, there is no other choice. Solder must be IT zinc free. If you
must not allow solder to eat in the gold, or results will be very
ugly. Super tight joints and super temperature control required.