Brian1315: Agree with you that
Quote:
anacs's DMPL is not PCGS DMPL
but do you know more details to exact requirements? This is something that PCGS would not disclose when I asked.
As far as I know they measure 3 things:
1)mainly depth of reflectivity (but how many inches and how many precision points do they measure on each side) Maybe PCGS requires 8" on 12 different points and ANAC requires "6 and checks only 8 points for example? Maybe this is their secret?
2)degree of contrast
3) surface imperfections that distract from points 1&2 maybe qualify a downgrade from DMPL TO PL
<Also noted that PCGS requires DMPL on both sides - DMPL obverse with PL reverse will be downgraded to PL automatically - known>
Specifically though (and back to my original question), does anyone have any evidence that PCGS standards for DMPL have increased recently? I ask because I have many old PCGS slabs with DMPL status that are much duller that the ones now graded PL and I am in limbo whether or not to send any of them to regrade.