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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
press ceramic cracking
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<blockquote data-quote="FASTFNGR" data-source="post: 343792" data-attributes="member: 3900"><p>Going back to pressing time, the was a rule for the size and the direction of the </p><p>sprue that determines the flow of particles after melting. It was as I remember 6mm sprue and yes cooling is a big issue. I never put on a cold and solid surface. I always put it on a metallic surface like the top of the burn out oven till it cools. Hope it helps.</p></blockquote><p></p>
[QUOTE="FASTFNGR, post: 343792, member: 3900"] Going back to pressing time, the was a rule for the size and the direction of the sprue that determines the flow of particles after melting. It was as I remember 6mm sprue and yes cooling is a big issue. I never put on a cold and solid surface. I always put it on a metallic surface like the top of the burn out oven till it cools. Hope it helps. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
press ceramic cracking
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