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Fixed
PFM metal containing silver.
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<blockquote data-quote="charles007" data-source="post: 77000" data-attributes="member: 9"><p>Silver alloys are fine, no problems if you follow the guidelines..I used silver Noble alloys with different brands of porcelain for to many years, 25-28% silver with out any greening or checking. Just make sure the CTE of the alloy is a match for your porcelain . I rather be in the middle of the CTE than the upper top limits. If your told by the alloy company to slow cool for over 1 minute, such as 2-3 minute slow cool, run from that alloy, or porcelain., unless you like deep checking in your porcelain. What brand of porcelain are you using on your zir frames ? I would try to use the same brand of porcelain on your pfms.. Noritake, GC, Creation, Ivoclar, Shofu, all work well with silver. If your looking to use the higer silver alloys 37%, your limited on the porcelains that will match..</p></blockquote><p></p>
[QUOTE="charles007, post: 77000, member: 9"] Silver alloys are fine, no problems if you follow the guidelines..I used silver Noble alloys with different brands of porcelain for to many years, 25-28% silver with out any greening or checking. Just make sure the CTE of the alloy is a match for your porcelain . I rather be in the middle of the CTE than the upper top limits. If your told by the alloy company to slow cool for over 1 minute, such as 2-3 minute slow cool, run from that alloy, or porcelain., unless you like deep checking in your porcelain. What brand of porcelain are you using on your zir frames ? I would try to use the same brand of porcelain on your pfms.. Noritake, GC, Creation, Ivoclar, Shofu, all work well with silver. If your looking to use the higer silver alloys 37%, your limited on the porcelains that will match.. [/QUOTE]
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PFM metal containing silver.
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