I’ve been learning how to cast silver for the last couple of months
and after lots of trial and error, mostly error, i achieved some
small successes casting 60-70 grams at a time in 3x3 flasks, so i
decided to move up to 3x4 flasks with 100- 150 gram charges. the
problem is that I guess i tried to cram too much into these flasks
and when I had finally melted all that metal with my "little torch"
casting tip, my partner got the flask onto the vacuum pad, turned on
the vacuum, the gauge wouldn’t go past 17, there was a horrible
sucking sound, and it became obvious something was wrong. I guess 1/4
inch of investment above the top of the tree isn’t quite enough?
So now that I have a bunch of investment in the filter and hose of
my vacuum line, and it appears some fine white powder has also made
it past the filter and into the line going to the "cast/invest"
switch on my VIC 9 casting unit, is cleaning it out of there and
changing the oil going all I have to do to deal with this?
Should I install another filter in the line since the stock filter
doesn’t seem adequate? what about the metal that was probably
overheated and abandoned in the crucible when it became clear that
the flask had blown? is it still usable? should I treat it like an
old sprue button and mix it with fresh grain?
I switched investments recently from westcast caster’s choice to
satincast and it seems like satincast is a bit softer, maybe that
has something to do with it?
Also, I’m thinking about a bigger torch for melting cause the “little
torch” is just too little. any suggestions? still learning the hard