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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Help, new to pressing
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<blockquote data-quote="ztech" data-source="post: 339175" data-attributes="member: 3022"><p>The pitting is not acceptable. That is the result of the hold at an excessive temp. Increase hold and decrease temp, LiSi recommends a 25 min hold and Emax recommends 15. If you stray far from that, the pits or the result. The temp is variable to the oven the other parameters are not.</p><p></p><p> On your sprue, place the sprue on or slightly behind the incisal edge to prevent another problem you will otherwise encounter. While pressing the rods of the material align while going through the narrow sprue. Once on the other side, they tumble and mix. This alignment will create a visual anomaly that is like looking through a the end of a glass rod. It will result in a grey circle that is extremely difficult to cover with colorant.</p></blockquote><p></p>
[QUOTE="ztech, post: 339175, member: 3022"] The pitting is not acceptable. That is the result of the hold at an excessive temp. Increase hold and decrease temp, LiSi recommends a 25 min hold and Emax recommends 15. If you stray far from that, the pits or the result. The temp is variable to the oven the other parameters are not. On your sprue, place the sprue on or slightly behind the incisal edge to prevent another problem you will otherwise encounter. While pressing the rods of the material align while going through the narrow sprue. Once on the other side, they tumble and mix. This alignment will create a visual anomaly that is like looking through a the end of a glass rod. It will result in a grey circle that is extremely difficult to cover with colorant. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Help, new to pressing
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