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Fixed
F.C. Gold Casting
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<blockquote data-quote="user name" data-source="post: 21144" data-attributes="member: 1719"><p>I do weigh my patterns and sprue and dont get any button beyond my reservoir except maybe a mm of feeder, and Im thinking not investment break-down because its been happening on the whites too and I use microstar on those. Im thinking theres a major clue in that the pits are on the exterior surface and dont permiatthe casting. Do you guys clean your torch tips? When I take it off, I rap it on the counter onto a piece of white paper, and get dark dusty flakes. Im not sure if its shedding from the copper tip itself of a carbon residue maybe? -but theres no burning going on inside the tip...?</p></blockquote><p></p>
[QUOTE="user name, post: 21144, member: 1719"] I do weigh my patterns and sprue and dont get any button beyond my reservoir except maybe a mm of feeder, and Im thinking not investment break-down because its been happening on the whites too and I use microstar on those. Im thinking theres a major clue in that the pits are on the exterior surface and dont permiatthe casting. Do you guys clean your torch tips? When I take it off, I rap it on the counter onto a piece of white paper, and get dark dusty flakes. Im not sure if its shedding from the copper tip itself of a carbon residue maybe? -but theres no burning going on inside the tip...? [/QUOTE]
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