I recently made a bracelet that was 1" x 1/2" slightly dapped
pieces of 18G sterling silver with tube hinges appliqued in
freeform type patterns of 22G hammered 10kt gold. The dapping
was done after each section was finished before pinning the
hinges. First I fluxed and flowed my easy silver solder to the
back of each gold piece. Then I fluxed my silver and flashed it
dry, then lightly fluxed my gold pieces and set them while the
piece was still warm. The gold dried to the silver and nothing
floated when I came back with the flame to solder. What worked
for me was to keep the flame away from the gold and just bring
the silver slowly to temperature holding the torch (I use a
mini-torch) at a fair distance and keeping it moving. I didn’t
heat from the back and I didn’t use charcoal. My soldering block
is a very porous one which lets me set pins to hold my pieces
firmly in place.
Maybe it was formally untaught fool’s luck - but I only had to
redo one piece out of the six; and that was the first one I tried
where I got a bit too eager with the heat and the gold flowed
slightly on me. Nothing lost though, I just flowed the gold a bit
more - did another piece similarly, didn’t dap, and put posts on
the back. A very nice pair of earrings.
Don’t laugh at me you mob - some of my fastest-selling pieces
have been recycled mistakes.