Hi Esta Jo.
- Jo. why drop in water instead of the charcoal block or an ingot
I leave this to Jo. I have only ever done this to granulate metal.
- If using an ingot mold, how fast is quenching done? I assume you
remove the mold first.
The metal mold takes heat way quickly. You can quench it straight
away or leave it for a minute or two. I let my white gold cool
longer than the yellow golds. I let my gold air cool when I first
started alloying with no problems.
The metal was slightly harder and needed annealing sooner but other
than that no problems.
DEFINATLY remove the metal from the mold.
HEAT THE METAL MOLD BEFORE POURING ANY HOT ALLOY INTO IT. If you
don’t it is very likely the molten metal will explode due to
difference in temperature and possible moisture in the mold.
WEAR EYE PROTECTION AND GLOVES.
I use a thin layer of oil in the bottom of the mold. This form a
barrier that helps the metal flow by slowing the cooling process.
- Should the metal be tarnish free and right out (so to speak) of
Fine gold, yes. 18 ct, less so. 14 ct even less so. The less pure
the alloy the more tarnish. I use a brass brush to remove ant
tarnish left after it is pickled.
- As you are stirring the metal with the quartz stick, and schmutz
(technical jewelry term, I believe) comes to the surface, what doyou
do with the schmutz?
If melting in a ceramic melting pot I sprinkle borax onto the metal.
The pot is already glazed with borax. Remove the flame from the ball
of metal for a couple of seconds. This causes the ?schmutz? to run
to the edge of the ball of metal and stick to the pot.
Before pouring, or if there is a lot of ?schmutz?, I use a metal bar
(usually the tang of an old bench file) to run around the edge of
the ball of metal to collect the excess flux.
Use at turning action as if you were picking up honey with a knife.
I cool the flux on the file between scoops by then twisting it
across a metal block. This makes the flux into a cone shape and
cools it so it doesn’t melt off the file back into the melting pot
on the next scoop.
Use quick scoops to prevent the flux melting as you try to scoop
more flux out of the pot before you pour.