A bid for help with a platinum/14k red gold project. We have
soldered to a 6mm wide band ( ring) thinner (1.5mm )boarders.,
Ther red gold was cast from gold, cooper, silver alloy and looked
and acted just fine untill we soldered the boarders to the platinum
with 20k white. Hairline cracks appeared- some larger than others.
we desperatly tried to repair the cracks via burnishing, and then
flowing ( or rather gobbing) 14k red easy solder. More cracks
appeared. The piece was air cooled through-out.
What did we do wrong? After grazing through the archives- I saw
that 20k white seemed to be the apprpriate solder… We suspect the
difference in melting points causing varying contractions in the
different metals may be the culprit… I remeber reading that Doug
has been working with plat and red gold. Any clues Doug? Should I
use 18k red to reduce a few more degrees between the metals? Any
tips would be much appreciated…Thanks to all for your various