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<p>[QUOTE="hotwheelsearl, post: 4695845, member: 75143"]There seems to be a Verdicare shortage, or so I've heard. Verdicare is a chemical used to treat verdigris, which tends to be a rock-hard, dark green substance that collects on the surface of the coin. Although verdigris is usually inert and won't cause too much further damage, it does look pretty ugly.</p><p><br /></p><p>From [USER=95247]@tenbobbit[/USER] I received two Postumus coins that were severely affected by verdigris. Knowing that lye seems to be a miracle solution, I tossed the coins into a haphazardly-mixed lye solution for about 6 hours and the results were magical.</p><p><br /></p><p>Billon/silver washed Pax reverse:</p><p>[ATTACH=full]1154201[/ATTACH]</p><p>[ATTACH=full]1154204[/ATTACH] </p><p><br /></p><p>Billon/silver washed Oriens reverse:</p><p>[ATTACH=full]1154202[/ATTACH] </p><p>[ATTACH=full]1154203[/ATTACH] </p><p><br /></p><p><br /></p><p>As you can see, the lye treatment all but eliminated all traces of tche verdigris, for the most part. There is still a little left on the body of Oriens and the face of Postumus on the Pax coin, but overall, I think this is a 100% improvement.</p><p><br /></p><p>PROS: removes 95-99% of verdigris from surface</p><p> can reveal previously-hidden silvering</p><p> seems to brighten up silvering significantly</p><p><br /></p><p>CONS: softens out some details (see the NS in ORIENS, and the sharpness of the POSTVMVS legends)</p><p><br /></p><p>Overall, I think this is a great result.</p><p><br /></p><p>DISCLAIMER: only subject to coins that are either a) inexpensive or b) guinea pigs as you can, and will, ruin some coins with lye. Do not soak any of your 4-figure coins in lye, no matter what.[/QUOTE]</p><p><br /></p>
[QUOTE="hotwheelsearl, post: 4695845, member: 75143"]There seems to be a Verdicare shortage, or so I've heard. Verdicare is a chemical used to treat verdigris, which tends to be a rock-hard, dark green substance that collects on the surface of the coin. Although verdigris is usually inert and won't cause too much further damage, it does look pretty ugly. From [USER=95247]@tenbobbit[/USER] I received two Postumus coins that were severely affected by verdigris. Knowing that lye seems to be a miracle solution, I tossed the coins into a haphazardly-mixed lye solution for about 6 hours and the results were magical. Billon/silver washed Pax reverse: [ATTACH=full]1154201[/ATTACH] [ATTACH=full]1154204[/ATTACH] Billon/silver washed Oriens reverse: [ATTACH=full]1154202[/ATTACH] [ATTACH=full]1154203[/ATTACH] As you can see, the lye treatment all but eliminated all traces of tche verdigris, for the most part. There is still a little left on the body of Oriens and the face of Postumus on the Pax coin, but overall, I think this is a 100% improvement. PROS: removes 95-99% of verdigris from surface can reveal previously-hidden silvering seems to brighten up silvering significantly CONS: softens out some details (see the NS in ORIENS, and the sharpness of the POSTVMVS legends) Overall, I think this is a great result. DISCLAIMER: only subject to coins that are either a) inexpensive or b) guinea pigs as you can, and will, ruin some coins with lye. Do not soak any of your 4-figure coins in lye, no matter what.[/QUOTE]
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