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Gemstones, Minerals & Fossils
Lapidary
Sneaky Gems.
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<blockquote data-quote="Lefty" data-source="post: 410147" data-attributes="member: 2976"><p>This can be a problem with sapphire, especially if you polish on a ceramic lap which doesn't act as a heat sink near as well as a metal lap. Because I usually polish sapphire on ceramic, I usually dop them with epoxy from the start - had too many heat up, soften the wax and turn out of alignment back in the early days.</p><p></p><p>I still dop lots of other stones with wax, the advantage is that it reaches maximum strength in about a minute or two.</p><p></p><p></p><p></p><p>I heard that!!!! </p><p></p><p>Only had it happen to me once, a small dop that I guess I pushed to hard on. Took me quite a while to work out what the problem was - I reckon I aged about 10 years in a few weeks <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="Lefty, post: 410147, member: 2976"] This can be a problem with sapphire, especially if you polish on a ceramic lap which doesn't act as a heat sink near as well as a metal lap. Because I usually polish sapphire on ceramic, I usually dop them with epoxy from the start - had too many heat up, soften the wax and turn out of alignment back in the early days. I still dop lots of other stones with wax, the advantage is that it reaches maximum strength in about a minute or two. I heard that!!!! Only had it happen to me once, a small dop that I guess I pushed to hard on. Took me quite a while to work out what the problem was - I reckon I aged about 10 years in a few weeks :D [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Sneaky Gems.
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