Acetone Knackers NGC Slab Plastic & Logo!

[Coinery]

Not tried on a slab , but I always use a smear of brasso to remove the sticky

gunge tapes and sticky labels leave on plastic items. I alway tend to " smash

the slab " as I like to know whats hidden away around the edge of a coin even if

I can see the Obverse and Reverse well

Brasso, now there's a thought!

[TomGoodheart]

Mmm ... not sure about unfrosting, I seem to remember there's some stuff for polishing up perspex (it too goes opaque when glued) but have never tried it. Anything like Brasso/ jeweller's rouge will surely have an abrasive effect, which you won't want?

And for future reference .. to clean off sticky sellotape, either those alcohol wipes or that alcohol hand cleaner you can get (the sort used in hospitals) should be safe. Failing that, a little WD40 on a tissue or cotton wool.

Edited August 4, 2012 by TomGoodheart

[Peckris]

Mmm ... not sure about unfrosting, I seem to remember there's some stuff for polishing up perspex (it too goes opaque when glued) but have never tried it. Anything like Brasso/ jeweller's rouge will surely have an abrasive effect, which you won't want?

And for future reference .. to clean off sticky sellotape, either those alcohol wipes or that alcohol hand cleaner you can get (the sort used in hospitals) should be safe. Failing that, a little WD40 on a tissue or cotton wool.

Or surgical spirit?

[Coinery]

Mmm ... not sure about unfrosting, I seem to remember there's some stuff for polishing up perspex (it too goes opaque when glued) but have never tried it. Anything like Brasso/ jeweller's rouge will surely have an abrasive effect, which you won't want?

And for future reference .. to clean off sticky sellotape, either those alcohol wipes or that alcohol hand cleaner you can get (the sort used in hospitals) should be safe. Failing that, a little WD40 on a tissue or cotton wool.

Or surgical spirit?

Easy, I'm still in a period of mourning, gentlemen, I'm beating myself up on grounds of the most stupid of stupidness stupidity!

I'll check-out the Perspex polisher as, despite all the resistance there is to slabs (and I wouldn't collect them, but would definitely have them on investment grounds), the coin is worth much more on the world market inside its little MS-graded plastic NGC tomb! Somebody else can buy it one day and set it free!

Much like Seuk stated in a different thread, I also cannot afford to keep every coin I drop my jaw at, as much as I'd like to, but I can afford to get a good look at some bloody decent coins along the way!

[Colin G.]

Depending on the value of the coin within, you could always get it resubmitted if you want it in a slab

[TomGoodheart]

Depending on the value of the coin within, you could always get it resubmitted if you want it in a slab

That might actually be the simplest and safest option. Within the US they will re-holder a slabbed coin in one of their new 'edge view' holders for $7.50. Why not contact them? http://www.ngccoin.co.uk/services.asp Though looks like you will need to send the coin to Germany or Switzerland ...

Edited August 4, 2012 by TomGoodheart

[Coinery]

Depending on the value of the coin within, you could always get it resubmitted if you want it in a slab

I did wonder about that, and I guess they could hardly re-grade it, if their online image clearly identifies it as the coin they first graded? You never know though?

[Coinery]

Depending on the value of the coin within, you could always get it resubmitted if you want it in a slab

That might actually be the simplest and safest option. Within the US they will re-holder a slabbed coin in one of their new 'edge view' holders for $7.50. Why not contact them? http://www.ngccoin.co.uk/services.asp Though looks like you will need to send the coin to Germany or Switzerland ...

Will try a couple of the polishing solutions here, without any fear now, as I think the above is where we are ultimately at!

[ChKy]

Acetone is an organic solvent und should be kept away from any kind of hydrophobic/amphipatic polymer (plasics) ;-)

Like most collectors in my country/vicinity I do not like slabs anyways...

[ChKy]

I added the picture below to show what I mean. That is a german 10 Pfennig piece minted prior WWI. The grading service estimates the grade at Xf-40. After I opened the slab in order to incorporate the coin into my collection I found that the coin has a significant rim damage. Furthermore it turned out that the coins surface was grinded/rubbed at the dominant "10" of the denomination (that rarely can be shown by scaning).

In addition it shows to much wear in my view. In my opinion this coin is never ever at xf-condition. At highest it would reside at an intergrade between fine to very fine condition. I would have never purchased that one under other circumstances...

[Rob]

I added the picture below to show what I mean. That is a german 10 Pfennig piece minted prior WWI. The grading service estimates the grade at Xf-40. After I opened the slab in order to incorporate the coin into my collection I found that the coin has a significant rim damage. Furthermore it turned out that the coins surface was grinded/rubbed at the dominant "10" of the denomination (that rarely can be shown by scaning).

In addition it shows to much wear in my view. In my opinion this coin is never ever at xf-condition. At highest it would reside at an intergrade between fine to very fine condition. I would have never purchased that one under other circumstances...

I get the impression NNC is a one man band who puts whatever number he thinks of first on the slab. Looking at many of his slabs, if it says 62 think 26, if UNC think VF. Only buy from this guy if you absolutely are certain what you are doing. He isn't alone in hiding edge damage though as I've also had NGC and PCGS slabs which have hidden defects. As a result, I tend to automatically mark a slab down unless I know the particular coin in question having seen it in the hand previously. You also have to consider the difference between an American EF and a UK EF. Generally speaking, a British EF will be in an AU holder.

Edited August 5, 2012 by Rob

[RLC35]

Rob,

You are right...the guy who goes by "Centsles" on ebay is slabbing these coins as NNC. He always over grades by at least one full grade or more. I would never buy a coin from him!

[VickySilver]

Absolutely NOT the same as the other slabbers - PCGS and NGC who have occ. their own shortcomings but not the same "ilk" .

[brauereibeck]

I'm going to see whether jewellers rose can bring the surface back to life (may even give T-cut a trial on an Acetoned CD cover), the opaqueness can only be microns deep! I'm not quite as bothered about the HOLOGRAM as it's still obviously their hologram, and the online images match clearly, but it would be good to see the coin at least!

Brasso will polish perspex very nicely... I've tried it on motorcycle fly-screens with surprisingly good results.

[Rob]

Absolutely NOT the same as the other slabbers - PCGS and NGC who have occ. their own shortcomings but not the same "ilk" .

His grading is certainly divorced from any other appraisals being at least a grade over from what I've seen, but the hiding of edge defects is common to all. I've have half half a dozen from NGC or PCGS over the years which looked good front and back, but I wouldn't have bought them based on the hidden side view which of course you only find out on liberation. I guess the temptation to slab an EF early Georgian copper is compelling to the person submitting if they know the TPG will give it a grade irrespective of concealable defect. If these hidden defects were noted it would be ok, but they aren't. Flaws on early coppers are more common and a consequence more acceptable - but only at a price.

[Coinery]

I'm going to see whether jewellers rose can bring the surface back to life (may even give T-cut a trial on an Acetoned CD cover), the opaqueness can only be microns deep! I'm not quite as bothered about the HOLOGRAM as it's still obviously their hologram, and the online images match clearly, but it would be good to see the coin at least!

Brasso will polish perspex very nicely... I've tried it on motorcycle fly-screens with surprisingly good results.

Nice one, thank-you!

[Peter]

Absolutely NOT the same as the other slabbers - PCGS and NGC who have occ. their own shortcomings but not the same "ilk" .

His grading is certainly divorced from any other appraisals being at least a grade over from what I've seen, but the hiding of edge defects is common to all. I've have half half a dozen from NGC or PCGS over the years which looked good front and back, but I wouldn't have bought them based on the hidden side view which of course you only find out on liberation. I guess the temptation to slab an EF early Georgian copper is compelling to the person submitting if they know the TPG will give it a grade irrespective of concealable defect. If these hidden defects were noted it would be ok, but they aren't. Flaws on early coppers are more common and a consequence more acceptable - but only at a price.

CGS do it too.

I think I posted this a couple of years ago when a 18?? farthing with edge damage sold for £90 ended up in their slab and a £150 price tag.

I have bought a few coins from Centsles but have bought the coin not the slab.

[HistoricCoinage]

I have bought a few coins from Centsles but have bought the coin not the slab.

Same. I bought an unslabbed coin that they misidentified in my favour.

[VickySilver]

I believe that both PCGS and NGC have

"edge" revealing holders now standard.

[Colin G.]

I believe that both PCGS and NGC have

"edge" revealing holders now standard.

Yes but the NGC pronged one is not the most aesthetically pleasing and the prongs themselves can cover a portion of the design on smaller denominations.

[Hussulo]

Acetone, not great with plastic. Also if you are ever dipping a coin in acetone, use a glass container.

NGC will simply re-holder your coin for a small fee, they won't re-grade it unless you ask for that but that costs more.

[copper123]

Vf at the best IMHO

[Coinery]

Acetone, not great with plastic. Also if you are ever dipping a coin in acetone, use a glass container.

NGC will simply re-holder your coin for a small fee, they won't re-grade it unless you ask for that but that costs more.

Thanks Hussulo, very much appreciated!