The thickness requirements for your domes can vary greatly. How large
a diameter, how high a dome, what type of object, and location? The
simplest answer would be to ask yourself the same question of
sterling silver. What thickness would you use in sterling? Forming
simple dome shapes would not significantly work harden the metals and
soldering would re-anneal. So, they should be consider annealed.
That would be fine in 24g for a pendant or earring. Something in a
belt buckle or ring would require a heavier gauge.
You mention rings. It you are thinking of sterling copper
mokume-gane then you should think again. Mokume-gane containing high
content copper alloys is not recommended for rings. Skin contact is
high. The potential for skin reactions is high. We do not recommend
the use of copper, shakudo or shibuichi in ring fabrications. That
leads you to the all precious metal combinations, a cost factor that
may have you rethinking your designs and market.
Baldwin,s Patina turns copper a very nice warm brown. Like an old
penny. It does not affect sterling or gold alloys. The acid
components secreted by skin in close contact with the patina will
eat through it. Then nature will take it course. This patinas does
not act as a seal from the environment. It is indeed possible for
these acids to eat the copper out of the laminate completely. We have
seen it happen.
I am afraid it is back to the drawing board.
PS Sorry I didn’t answer sooner. Often it is most interesting to
hang back and watch where a thread goes. B
Bill, Deborah & Michele
Reactive Metals Studio, Inc
928-634-3434, 800-876-3434, 928-634-6734fx