Hello Carlo, You said: "Hi I'm struggling, with the problem of
soldering a 3mm 18ct single drilled bead on to a fine silver snake
chain. I can only afford to have about 1mm of the chain go solid
from solder flow. I've tried a stopout on the chain but that does
not seem to stop the solder flow down the chain."
White-out works very well to prevent solder flow from previously
soldered joints. I recently repaired 2mm ball chain and only
soldered together the two balls on either side of the break. It is
also useful to put a heat shield over the chain. An easy heat shield
is a strip of copper bent into a "V", with a little "v" cut into one
side. The big "V" rests on its side with the little "v" over the
chain, allowing only the bit you want to solder to be exposed.
Hope this description helps, Judy in Kansas
Judy M. Willingham, R.S.
B.A.E. 237 Seaton Hall
Kansas State University
Manhatttan KS 66506
(785) 532-2936 FAX (785) 532-6944