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<p>[QUOTE=&quot;GDJMSP, post: 3254023, member: 112&quot;]Yes, if you care to take the time to look you&#039;ll find it on their websites, and or in articles. But even then the distances given often vary somewhat depending on the age of the article. General rule of thumb, PL requires text to be readable in the reflection at a distance of at least 2 inches and sometimes 4 inches. In a recent article PCGS stated that DMPL required 6 inches, but they have previously used 8 inches as the minimum. I believe NGC currently uses 8 inches as the minimum for DMPL and 2-4 inches for PL. But NGC also has a designation beyond that - I think they call it UDMPL, ultra deep mirror proof like, and it requires 12 inches.</p><p><br /></p><p>The PL and DMPL designations are the only special designations that have physically measurable qualifiers, all others rely on opinion alone.[/QUOTE]</p><p><br /></p>

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