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Has anyone ever heard of a coin being lasered in-slab?
renomedphys
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It just seems that a laser could penetrate a clean highly polished slab no problem.
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<< <i>wouldn't the heat melt the slab? >>
From the laser's interaction with the slab or the heat generated from the surface of the coin? I don't think the laser would interact strongly enough with the slab to melt it. This could be determined experimentally with a $10 coin, provided you have a laser.
Empty Nest Collection
I know the slabs can come close to melting just from using my halogen lights to take pics.
<< <i>I meant from the hot metal,
I know the slabs can come close to melting just from using my halogen lights to take pics. >>
...yet ANOTHER reason to have glass slabs.
<< <i>It just seems that a laser could penetrate a clean highly polished slab no problem. >>
You're kidding right?
The melting point of gold is above 1,900 degree Farenheit yet the ignition point of paper is a paulty 842 degrees Farenheit.
Given the fact that to successfully laser a coin, the gold has to reach its melting point, I think that the confined space of a slab would prohibit any dispersion of the heat generated during the process provided the plastic is not affect by the laser.
The name is LEE!
<< <i>I think you would be absolutely amazed at what can be done with a laser in highly skilled hands >>
.......in the proper conditions friend.
The name is LEE!
<< <i>...yet ANOTHER reason to have glass slabs.
Reminds me of an old saying...
...coins that live in glass slabs shouldn't grow tone
Empty Nest Collection
<< <i>
<< <i>...yet ANOTHER reason to have glass slabs.
Reminds me of an old saying...
...coins that live in glass slabs shouldn't grow tone
...just think. you could REALLY crack 'em out!
--------T O M---------
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To upgrade on a regrade?
No, I have never heard of a coin being lasered in a slab.
So, does one laser it in the slab then send it for a re-grade? Crack it and send it? Sell it without re-grade?
<< <i>I dunno, how can they laser someones eye lens without melting the surrounding tissue? If they can do that maybe they can laser a coin in a slab. >>
Body parts cook instead of melt...
<< <i>
<< <i>It just seems that a laser could penetrate a clean highly polished slab no problem. >>
You're kidding right?
The melting point of gold is above 1,900 degree Farenheit yet the ignition point of paper is a paulty 842 degrees Farenheit.
Given the fact that to successfully laser a coin, the gold has to reach its melting point, I think that the confined space of a slab would prohibit any dispersion of the heat generated during the process provided the plastic is not affect by the laser. >>
Actually I think you will find that paper will ignite at around 450 degrees Fahrenheit .
it is top secret so no one is supposed to know about it, but I experienced it one sunny day a couple of summers ago
I had an inexpensive PCGS statehood quarter I purchased at a local small show and threw it on the dash of my car
which I forgot about for a couple days
It seems the rubber/silicone gasket-like product that surrounds the coin inside the slab covering the edges
has a much lower melting point than any of the things you mention
and due to the heat conductivity of most of the coins in the PCGS slabs, it would be appropriate to this discussion
if the slab gets hot - the stuff melts and leaves large air bubbles
once it cools, it comes off easily in 1 piece
so my recommendation is do not buy any coin in a PCGS slab surrounded by air bubbles in the silicone
<< <i>I dunno, how can they laser someones eye lens without melting the surrounding tissue? If they can do that maybe they can laser a coin in a slab. >>
Are you referring to cataract surgery or lasik?
If cataract surgery , the lens is not lasered. It's fragmented and removed using ultrasound, during which a constant stream of saline is running through the instrument and eye to maintain eye pressure and provide cooling.
If lasik, it's the cornea that's reshaped, not the lens. It's an excimer laser which breaks molecular bonds and vaporizes tissue. This type of laser does not generate heat.
<< <i>FBL!!!! >>
Fixed Bell Lines!!!
FLL!!!! Full Lasered Lines.
``https://ebay.us/m/KxolR5
<< <i>
<< <i>I dunno, how can they laser someones eye lens without melting the surrounding tissue? If they can do that maybe they can laser a coin in a slab. >>
Body parts cook instead of melt... >>
``https://ebay.us/m/KxolR5
<< <i>The OP should not ask this question of high school physics students, who would laugh at him shamelessly. >>
Actually, I am a physicist by trade. I'm also not afraid to ask questions. Even seemingly dumb ones. You'd be surprised what's within the realm of clever science.
Empty Nest Collection
<< <i>
<< <i>I dunno, how can they laser someones eye lens without melting the surrounding tissue? If they can do that maybe they can laser a coin in a slab. >>
Body parts cook instead of melt... >>
My understanding is that the cornea is peeled back for this type of surgery.
The name is LEE!
<< <i>Why would you even want to try isn't the reason coins are lazered is to increase the grade when submitted for grading? >>
I would think that if a slab lasered coin were sent in for a re-grade it would be less likely to be scrutinized for lasering than if it were sent in raw.
If its to get a higher grade pcgs cracks the coins out of the current holder before the grading for a regrade.