New title: Coins continue to tone in slabs (right?) need a sealer?
ChrisRx
Posts: 5,619 ✭✭✭✭
ChrisRx
Posts: 5,619 ✭✭✭✭
Comments
accomplish. Preservation to the nth degree? Are you going to bury them in the backyard
or do you live in the tropics? Maybe I'm just missing something here. Hope you find
a sealer and it seals real good!
bob
<< <i>Several guys here have mentioned they use the foodsaver product.... >>
Thanks!
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<< <i>Even sealed, coins can "outgas". Existing impurities already on the coin or inside the holder can continue to affect the surface of the coin. Smoething to think about there. >>
Yea I hear ya, but after having an ASE spot on me, not taking any chances with my pricier proofs.
<< <i>
<< <i>Even sealed, coins can "outgas". Existing impurities already on the coin or inside the holder can continue to affect the surface of the coin. Smoething to think about there. >>
Yea I hear ya, but after having an ASE spot on me, not taking any chances with my pricier proofs. >>
Milkspotting didn't seem to be based upon any external factors. Nevertheless, Intercept Shields have quite a following
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Bruce
intercept shield boxes
<< <i>I have also heard that after sealing slabbled or raw coins inside a "food sealer" bag, they are then placed ina freezer. Apparently this gretly reduces the amount of toning whci goes on.
Bruce >>
If you pulled the coins out of the freezer and let them "thaw out," wouldn't condensation start to form either on the slab or inside the slab? Wouldn't that be a bad thing?
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There are two other threats to coins in slabs, though. First, there is the label. Morgan dollars that are white except for a purple crescent on the upper reverse and lower reverse have most likely been in the older ANACS slabs, as the paper label off-gassed enough sulfur to tone part of the coin in the holder. Second, there's whatever was trapped in the holder with the coin at the time it was sealed. I don't think any of the TPGs use clean rooms to seal their coins, and any surface or airborne contaminant will be trapped with the coin, unable to escape. If a Taco Bell napkin fiber lands on the coin during sealing, it's going to stay there. If someone walks by and...uh... off-gasses their Taco Bell lunch, that's going into the slab as well. If the relative humidity in the sealing room isn't very low, you have moisture trapped in the slab. None of those can be prevented by further sealing the slab. If a grading service did use a certified clean room to holder coins, you would no doubt see it reflected in the fees.
Another thing you could do beyond the Intercept Shield box in a cool. dry environment is throw a few bright red pennies in with your slabs, not as an additional barrier, but as an indicator as to whether your environment is safe for your coins or not. Take pictures, or have pictures taken, of the coins in the slabs so you see colors and no luster (think Goldberg catalog). Repeat the exercise in a couple years, looking for any abrupt change in color, spots, or abnormally shaped moles, that may warrant having the coin reholdered.
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John
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