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Lab talk, the good, the bad, and the ugly
Metal
Porosity on semi precious
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<blockquote data-quote="PDC" data-source="post: 234826" data-attributes="member: 3385"><p>I think the first oxidation cycle burns out any impurities in the metal which are then deposited on the surface. I know we all blast before oxidizing, but some of those impurities are just underneath the surface. Blasting that off after the first oxidation cycle and re-oxidizing helps to get rid of that thus producing less bubbling in the opaque.</p><p></p><p>In regards to the high palladium alloys, I think they heat up faster than the higher gold containing alloys. It would seem logical since they are less dense and lighter in weight. That is why you need to lower the entry temp so you don't "boil out" the opaque liquid to quickly.</p></blockquote><p></p>
[QUOTE="PDC, post: 234826, member: 3385"] I think the first oxidation cycle burns out any impurities in the metal which are then deposited on the surface. I know we all blast before oxidizing, but some of those impurities are just underneath the surface. Blasting that off after the first oxidation cycle and re-oxidizing helps to get rid of that thus producing less bubbling in the opaque. In regards to the high palladium alloys, I think they heat up faster than the higher gold containing alloys. It would seem logical since they are less dense and lighter in weight. That is why you need to lower the entry temp so you don't "boil out" the opaque liquid to quickly. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Metal
Porosity on semi precious
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