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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Zubler Vario Press 300 problem
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<blockquote data-quote="user name" data-source="post: 152842" data-attributes="member: 1719"><p>I dont know if that crown was invested by itself, but you can help both problems (margin and gray) with one trick...Always sprue up an extra pattern that extends just past the highest point of your other patterns. I wind a piece of 14ga wax rope around the end of my instrument so I have a coil. Attach it to the sprue base and make sure that it is a bit taller than your crown. because of its height and coiled length, it will take longer to fill and it will keep the pressure on the plunger after your crown pattern is filled.</p></blockquote><p></p>
[QUOTE="user name, post: 152842, member: 1719"] I dont know if that crown was invested by itself, but you can help both problems (margin and gray) with one trick...Always sprue up an extra pattern that extends just past the highest point of your other patterns. I wind a piece of 14ga wax rope around the end of my instrument so I have a coil. Attach it to the sprue base and make sure that it is a bit taller than your crown. because of its height and coiled length, it will take longer to fill and it will keep the pressure on the plunger after your crown pattern is filled. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Zubler Vario Press 300 problem
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