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<p>[QUOTE="GDJMSP, post: 7701588, member: 112"]No it isn't, it is done by a machine. And the same basic method has been used since the 1800's. The machines of today are more modern of course but the same large spinning disk impregnated with a paste of diamond dust is what been used to polish dies for well over a century. And it must also be understood that there is more than 1 step in the process. In the early steps a course paste is used, and in each subsequent step the paste used is finer and finer until the desired finish has been applied to the dies. And of course with Proofs, they use the finest grit possible to achieve the mirror finish.</p><p><br /></p><p>The link below will show you a video of how dies are polished at the mint.</p><p><br /></p><p>[MEDIA=youtube]K6J_uis3JWQ[/MEDIA]</p><p><br /></p><p>That method clearly illustrates why die polish line cannot criss-cross. It's simple, basic physics.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 7701588, member: 112"]No it isn't, it is done by a machine. And the same basic method has been used since the 1800's. The machines of today are more modern of course but the same large spinning disk impregnated with a paste of diamond dust is what been used to polish dies for well over a century. And it must also be understood that there is more than 1 step in the process. In the early steps a course paste is used, and in each subsequent step the paste used is finer and finer until the desired finish has been applied to the dies. And of course with Proofs, they use the finest grit possible to achieve the mirror finish. The link below will show you a video of how dies are polished at the mint. [MEDIA=youtube]K6J_uis3JWQ[/MEDIA] That method clearly illustrates why die polish line cannot criss-cross. It's simple, basic physics.[/QUOTE]
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