Rinsing after dipping?
AlbumNerd
Posts: 193 ✭✭✭
I'm dipping some old coins with PVC damage but I'm not sure if I should rinse the coins afterwards.
My fear is that if I don't, the PVC particulates in the solution will stay on the coin and will damage the entire coin over time.
If I should rinse after dipping, what should I rinse it with? More acetone?
Thoughts?
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Comments
I suggest three jars of acetone. Makes sure the bulk comes off in Jar 1, and change the acetone as necessary depending on the number of coins and amount of PVC/gunk you are removing. Set each coin aside to air dry.
Jar 2 gets the next pass, just to make sure any residue is gone. This one should stay pretty clean, but if it starts to cloud at all, change the acetone. Again, set each coin aside to air dry.
Jar 3 is the final pass, and this is probably overkill, but at least this means they all saw fresh acetone with (hopefully) no surface residue left. This time I try to allow them to dry on their edge atop a paper towel, so the acetone dissolves and runs away from the coin surfaces.
I have also used distilled water after Jar 3 from a squirter, and then patted dry, but this is not necessary from what I can tell if the multi-acetone method is followed ... and might cause an issue depending any water potentially spotting or the patting dry causing a minor hairline or "brush" mark.
“We are only their care-takers,” he posed, “if we take good care of them, then centuries from now they may still be here … ”
Todd - BHNC #242
I soak the coin in acetone, and keep a container of fresh acetone close so I can grab it and pour it on the coin immediately after i pull it out of the soak, before it has time to dry. I do it in my garage, the acetone i use to rinse evaporates off the concrete floor pretty quickly. I don't dry the coin, i just let the acetone evaporate off the surface after the rinse.
BHNC #248 … 130 and counting.
Umm, simple liberal irrigation with even tap water or distilled if you have it, then dish soap with fingers and then more irrigation with a tamp down afterward. NO RUBBING as per usual.
Well, just Love coins, period.
Use 100% pure acetone and a glass jar with glass lid or metal lid with no plastic liner. Let the acetone work 1-2 hours then use new acetone for the other side. When done rinse the coin under fresh acetone and let dry. Clean the jar with fresh acetone for 30-60 minutes (just add some to the jar and cover it) and then rinse with water when done.
No need to fill the whole jar with acetone just make sure the coin is covered. I use my hands with no protection (ex gloves you should never use plastic gloves anyways with acetone) and the acetone will not harm your skin in this short of period of time (few seconds) just rinse your hands under water with soap after.
what are you 'dipping' with?
Distilled water, rinse well.
Rising after dipping?
I suppose it could occurr for some if they are happy about the results.
"To Be Esteemed Be Useful" - 1792 Birch Cent --- "I personally think we developed language because of our deep need to complain." - Lily Tomlin
If the coin is untoned, ammonia will strip pvc off of a coin much faster than acetone FWIW. My suggestion would be to run it under tap water for several seconds after all pvc is removed, then rinse in a bowl of distilled water followed by patting them dry.
100% acetone
It's interesting that you mention using a glass lid. I currently plate my PVC damaged coins in a ceramic bowl, cover with 100% acetone, and cover the bowl with kitchen plastic wrap to prevent evaporation.
Is this a risk in using the plastic wrap to cover the bowl?
I am just guessing that acetone evaporation cannot be good for plastic. I am not a scientist maybe someone here can chip in on that. Just common sens is what I believe.
Some of my metal lids on mason jars have now rust on them from the acetone and the acetone never touched the lids directly. I use only glass lids now.
Although the lids on the acetone bottles are plastic with some type of lining in them.
Someone suggested these to me and this are what I only use now found on Amazon for cheap a set of 2 (good up to quarter sized coins):
Baluue Chemistry Weighing Bottle Weighing Flask 2pcs Experiment Weighing Bottle Labs Weighing Bottle with Lid Glass Weighing Holder Weighing Bottles Borosilicate Glass Weighing Bottle
They cost me 13$ Canadian for a set of 2. US must be 10$. I imagine there exists larger ones for half dollars and dollars.
Every coin I had a plastic lid I redid them in these glass bottles that was maybe 5-10 coins in my case. Just to be sure. Not even sure it did anything but it gave me peace of mind and that counts.
Put a ceramic plate over a ceramic bowl. Covering an organic solvent like acetone with plastic is asking for trouble.
One time I had the rubber gasket of a jar lid melt and drip into the acetone with a coin in it and ever since I’ve been careful with what I use to cover acetone
Mr_Spud
Glad you picked up these glass containers for 10$ (for those here you PM me that you made the purchase from Amazon). You need much less acetone as well with these containers because of their size. I believe they are good up to quarter sized coins I collect dime sized coins. I would imagine larger sized ones exist.
Probably. Put some plastic wrap in some acetone to see what happens. I'm guessing the plastic wrap will dissolve.
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"Paper money eventually returns to its intrinsic value---zero."----Voltaire
"Everything you say should be true, but not everything true should be said."----Voltaire
Just an FYI your title is wrong it is rinsing.
Good catch. Edited
When most people mention 'dipping' they are referring to a strong acid like e-Z-est, not water or acetone.
In the numismatic community, the word "Dipping", without other context such as specifying the chemical you're using, usually refers to "dip", also known as e-z-est or similar tarnish remover. E-z-est is made form sulfuric acid and thiourea; it is much harsher than acetone and will damage coins if not rinsed off properly. You definitely need to rinse off "dip", but not acetone.
The "three dips" method for acetone outlined by pursuitofliberty above is fine. If you have an acetone wash bottle, you can use that to rinse the coin instead, but that's a bit of overkill if the only use for acetone you have is to clean coins.
Roman emperor Marcus Aurelius, "Meditations"
Apparently I have been awarded one DPOTD.