22027Re: [Error Coin Information Exchange] pvc damage
- Oct 1, 2009yep, I've read online last night that people who have used tap water will later see spotting--sometimes the spotting won't be seen till a year later. The spotting is from contaminants that were in the tap water.
I've also read it's important to use 100% pure acetone, as most companies add additives to their acetone--if those additives are present, you will also contaminate the surface of your coin.
--- In firstname.lastname@example.org, innff@... wrote:
> I distrust the water supplies of any city, county or state. There are just
> to many pollutants in their supplies of water that chorine and filtering
> cannot remove. Give me the straight acetone bath to remove residue.
> In a message dated 9/30/2009 4:32:03 P.M. Eastern Daylight Time,
> darkdesert@... writes:
> Unfortunately, I found some pvc damage on a few of my coins. Even though I
> had put them into archival plastic sheets (free of pvc), I guess they must
> of had slight corrosion but either I failed to notice it, or it got worse
> and is now noticeable. Why would anyone ever use pvc laden flips?
> Is it better to remove it by a gentle water wash and pat dry, or to just
> use pure acetone since it is capable of removing pvc contaminates. Can
> simply running water over the coin remove enough slime and corrosion to
> effectively stop the overall corrosion? Or do you have to chemically remove it with
> If you can see the slime on the clad coin's edge (copper part), does that
> mean the coin's surface is ruined?
> Also, if the coin was in a drawer near other coins, about an inch away,
> can its corrosive gases permeate and contaminate other nearby coins?
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