Message:

<p>[QUOTE=&quot;Colonialjohn, post: 2384603, member: 57741&quot;]When I tell people I invented a great copper cleaner I get all sort of responses so I normally just sell my JPL Coin Care to astute collectors since coin cleaning is such an exasperating topic although I enjoy its discussions. Having said that here is a good story... When I collected NJ Coppers and as some of you know I put together one of the great collections that sold in Stacks in 2008 (Americana Sale). One of the rarities in my collection was the Maris XXX. One of a dozen known and somewhere in the middle of the CC. The coin originally purchased was ORANGE and was harshly cleaned. So what to do? Anton and myself developed a process to strip off a micro-layer of the copper and then let the coin naturally tone back. After the stripping operation the coin was placed in a sulfur envelope for around SIX YEARS whereupon with just a touch ALSO of a common hair sulfur ointment was dabbed in the inside of the flip and eventually after more than a half decade later the coin came partially back with a olive brown color (i.e., natural tone).</p><p>IMO we brought back a great rarity to its original surfaces - others may say it was just profit orientated ... so the lesson here IMO ... if a coin that has been cleaned or dipped perhaps trying to bring back its original color its not such a bad thing. Agreed surface hairlines or light scrubbing is something all together different.</p><p>Coin conversation or trying to undo the stupidity of others is OK IMO. Also some coins just unfortunately are exposed to the environment in unfortunate circumstances as was this M XXX NJ Copper.</p><p>I have used aluminum foil wrap on silver coins in an electric oven for 15 minutes at 400*F. More time - more toning - but again usually just for dipped coins so the copper can react and bring the coin back - again you can never get that CARTWHEEL EFFECT back but again for me this is coin conservation if I am stuck with a clean coin or if I feel I can bring a coin some new life.</p><p>Just an opinion ... after the sale I did notify the buyer of this coin who did not mind the intensive conservation that went into this rarity ... just for the record. </p><p><br /></p><p>John Lorenzo</p><p>Numismatist</p><p>United States[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in