Hello to all,
After many years of engraving only, I’ve re-entered the full time
work force. I am returning to my roots, and fabricating silver
pendants, sometimes on a much larger scale than I’ve been used to.
Although the techniques and heat-related issues have come back with
practice, I am still having a couple of issues I believe the group
can answer.
I have been looking at ways to eliminate the small amount of fire
scale that I sometimes get on larger and heavier pieces, which have
a bezel and trim soldered to a back plate. I have purchased a small
amount of commercial Pripps flux to give it a try, and have been
happy with the results, but have some issues in trying to get an even
application. I am using a small pump spray sort of bottle, and store
it upside down in a jar with a small amount of water. I haven’t had
any issues with the sprayer clogging, so that part is working just
fine, thank you. I am spraying it on the warmed metal surface, but I
don’t get an even application on the first spray. Subsequent
applications will eventually cover the surface of the metal, and I
proceed to flux (Hoover & strong paste flux}, and add my solder,
heat as usual. What seems to be happening is that the Pripps and
paste flux bubble up prior to the paste flux melting, but my bezels
do not fall back onto the plate in an even manner, and my soldering
is sometimes incomplete. It’s almost as if the multiple applications
of Pripps has allowed some sections to remain “lifted” and not settle
back to the plate before the flux liquifies and the solder flows. I
have a little torch, acetylene, and just started using an annealing
tip for those big pieces, so I don’t think it’s an issue with heat,
but rather an issue with the multiple layers of Pripps. Any
suggestions?
Our pieces often have silver beads as part of the designs as well,
which we make by melting small bits of silver wire. I have noticed
that some of the balls come out smooth, and others have a wrinkled
appearance, often in the same batch. I use clean silver wire, and
flux each bit. I heat the bits one at a time, just until the ball
forms, withdraw the heat, and allow to cool slightly before
quenching in water. What seems to happen with the wrinkled ones is
some sort of slag that covers the surface until the ball comes up,
then it covers the ball as soon as the heat is removed, and a shiny
wrinkled skin appears. i can sand it off, but I don’t know what that
is, or if it can be prevented. Any insights here are appreciated as
well.
Orchid rocks, and I know some of you may be able to help me out!
Melissa Veres, engraver & silversmith