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Fixed
F.C. Gold Casting
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<blockquote data-quote="user name" data-source="post: 21315" data-attributes="member: 1719"><p>Let me ask another related question...In the 'old days', we used a piece of asbestos ring liner, moistened and adapted to the bottom of the crucible. for some reason somtimes we'd sprinkle borax in a crucible and fan it with the torch to put a glassy surface on it. I know Im getting old because I remember learning that, but what was the 'why'? Im guessing old time crucibles werent pure and caused contamination?? Does anyone still do that? I use quartz for my NP, and clay for gold. Dont know why...what do you use?</p></blockquote><p></p>
[QUOTE="user name, post: 21315, member: 1719"] Let me ask another related question...In the 'old days', we used a piece of asbestos ring liner, moistened and adapted to the bottom of the crucible. for some reason somtimes we'd sprinkle borax in a crucible and fan it with the torch to put a glassy surface on it. I know Im getting old because I remember learning that, but what was the 'why'? Im guessing old time crucibles werent pure and caused contamination?? Does anyone still do that? I use quartz for my NP, and clay for gold. Dont know why...what do you use? [/QUOTE]
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