Is lacquer ...INERT?
topstuf
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Too much time on hands leads to musing.
Lacquer worked good painted on coins, so maybe it would seal slabs..???
Is lacquer inert such as could be painted on slab SEAMS?
Would it keep gases from entering slab?
Archival boxes are clumsy.
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Clear silicone caulk neatly smeared on with your finger would seal it as tight as a ducks arse.
Won't the silicone be tacky?
No as the OP would only be applying a coat so thin that it would only fill the gap between the slab sections.
Clear silicone doesn't dry tacky as it becomes somewhat cushy rubbery feeling.
Lacquer is so 1920...
So if the OP feels the need to use something why not chose the same material that has been inside slabs to hold coins since the 1980's.
@Broadstruck said: "Lacquer is so 1920...">
"So if the OP feels the need to use something why not chose the same material that has been inside slabs to hold coins since the 1980's."
Then lacquer must work pretty good.
So inserts are made of silicone?
The old PCGS gasket was silicone as is the one used by NGC these days... Not sure if PCGS pronged thingy is?
Silicone comes in grades food to surgical and would be a better choice.
I guess I'll have to believe you - I have no intention of doing a comparison test.
I'll go out on a limb here and guess that @ricko would no the chemical aspects of lacquer.
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Most lacquer can be removed by paint thinner or acetone... sometimes, what is called lacquer, is not really... I have seen clear epoxy called lacquer... Cheers, RickO
Keep in mind that the gooey, gluey silicone is actually a silicone precursor. When you apply it, it reacts with air (technically, with the water vapor in air) to produce the rubbery, solid silicone seal. Note that the reaction produces acetic acid (vinegar) vapor. So, I wouldn't recommend silicone adhesives as a gap filler for slabs. You might trap in worse stuff than your are trying to keep out.
That was my concern also.
Mortar would have no chemical interaction if you can find a very tiny trowel?
If you can pack 70 pounds of your slabs into a USPS small flat rate box [without distorting it] you can send them to me and I will find a way to seal them for you
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So while the silicone is inert, its by-products are ert.
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Eric Newman used beeswax on his slabs
None of yours, though, just his.
Keeper of the VAM Catalog • Professional Coin Imaging • Prime Number Set • World Coins in Early America • British Trade Dollars • Variety Attribution
Lacquer is too “hot” in it’s liquid state and will chemically melt the plastic creating its own little noxious plume of gas that can seep in and get involved with the coin’s surface.
Even of its own, lacquer typically contains three active solvents to keep it liquid that will gas off. So mixed with plastic it’s no bueno for your coins.
My offer for 1937 vintage beeswax on the BST may be to no avail, but The Sniffer sure likes them
Epoxy?
That leaves gum. Now need the most inert flavor.
If we have to start worrying about protecting the coin protectors, or re-sealing the slab seals, we are in trouble.
Why dont we just Drop slab in inert transparent molten rubber, its the new super super secure ++ service. And it will bounce. Hours of fun. Lol.
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Then why does anyone use Intercept boxes?
anyone who has ever seen the tone on a slabbed coin left from being wrapped with a rubber band realizes that the slab shell isn't non-porous. why worry about the seal between the shell pieces??
just use the afore mentioned box.
So now "dipping" will involve the whole slab and all?
I shudda never started this.
Are you saying a rubberband can leave a tone streak on a coin in a slab?
I find that hard to believe.
I agree; however, I don't think Keets would post misinformation. I'm going to band up a bunch of slabs Monday and try to accelerate the process. Lill put bands around the edge and across the top and bottom. Thanks @keets
Just in appearance.
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I thought it was common knowledge about the rubber bands, are you guys saying you have never heard of it?? I have seen it plenty of times. it isn't like it's a dark tone, but there is a noticeable line sometimes left behind directly below where the rubber band was holding the slabs. it doesn't always happen and it takes some time. if we ever need to band slabs like that, we do it closer to the insert where it doesn't cover the coin(s).
I have seen it happen on cardboard 2 x 2 or flips but never thought it would happen thru a slab.