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Lab talk, the good, the bad, and the ugly
Dental-CAD
e.max Press - printed wax questions...
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<blockquote data-quote="2thm8kr" data-source="post: 153729" data-attributes="member: 1367"><p>I don't have a specific ratio answer for you.</p><p>This is how I work out my liquid/water to powder ratios:</p><p></p><p>Make a master die out of something other than stone, epoxy, pmma, etc.</p><p>Something that doesn't erode easily.</p><p>Fabricate your pattern out of desired material. Use manufacturer's recommendation for liquid/powder ratio. Cast or press and then check the fit on the master die. Incrementally increase or decrease the special liquid by 1cc as needed to increase or decrease expansion until you get the fit that you want. Write it down for each material you make the patterns from.</p><p></p><p>My ratios are different for wax vs. pattern resin. I don't use printed patterns so I won't be if much use regarding that.</p><p></p><p>I'll add that, denser alloys require more expansion that less dense alloys(high noble vs. base) regardless of the material used to make the patterns. I assume it is the same for ceramic density as well. (emax vs. empress or other)</p></blockquote><p></p>
[QUOTE="2thm8kr, post: 153729, member: 1367"] I don't have a specific ratio answer for you. This is how I work out my liquid/water to powder ratios: Make a master die out of something other than stone, epoxy, pmma, etc. Something that doesn't erode easily. Fabricate your pattern out of desired material. Use manufacturer's recommendation for liquid/powder ratio. Cast or press and then check the fit on the master die. Incrementally increase or decrease the special liquid by 1cc as needed to increase or decrease expansion until you get the fit that you want. Write it down for each material you make the patterns from. My ratios are different for wax vs. pattern resin. I don't use printed patterns so I won't be if much use regarding that. I'll add that, denser alloys require more expansion that less dense alloys(high noble vs. base) regardless of the material used to make the patterns. I assume it is the same for ceramic density as well. (emax vs. empress or other) [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
e.max Press - printed wax questions...
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