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Lab talk, the good, the bad, and the ugly
Metal
High Noble Gold Porosity.
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<blockquote data-quote="rgkbmk" data-source="post: 9681" data-attributes="member: 13"><p>Al and Russ give some good advice. Russ has helped me with my gold castings over the years and it has been appreciated. What I can tell you that I have learned was:</p><p>Minimal turn on the casting machine</p><p>Proper placement of the sprue and chill sprill makes all the differance. </p><p>A well centered casting arm is needed so as to not shock the metal when casting. If it bangs and doesn't sound smooth then it's not centered properly.</p><p>proper resevors in the right space.</p><p>proper gas oxygen mixture ( i do around 2lbs gas and 2 oxygen) for a cool flame.</p><p>Sorry this was a bit late.</p><p>Rick</p></blockquote><p></p>
[QUOTE="rgkbmk, post: 9681, member: 13"] Al and Russ give some good advice. Russ has helped me with my gold castings over the years and it has been appreciated. What I can tell you that I have learned was: Minimal turn on the casting machine Proper placement of the sprue and chill sprill makes all the differance. A well centered casting arm is needed so as to not shock the metal when casting. If it bangs and doesn't sound smooth then it's not centered properly. proper resevors in the right space. proper gas oxygen mixture ( i do around 2lbs gas and 2 oxygen) for a cool flame. Sorry this was a bit late. Rick [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Metal
High Noble Gold Porosity.
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