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'Xylene' - Is it a suitable product for use on Bronze AND Silver coins?
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<p>[QUOTE="Kentucky, post: 2871904, member: 33176"]Then ask another one. I am an organic chemist and as such know more about organic chemistry than inorganic chemistry. Verdigris is a loose term for corrosion on copper and can be copper acetate, copper chloride or copper carbonate (guess which acid copper carbonate comes from...drumroll) or a combination of any of these, or other copper containing compounds. I think [USER=17261]@BadThad[/USER] can speak to this much better than me, but it's kind of like the difference between tarnish and toning. If you like it, it's toning...if you don't like it, it's tarnish. If you have a green coloration on a coin that is stable, it's a patina called verdigris, if it has a tendency to spread, it's bronze disease. Green toning on copper coins makes me uneasy and I would just as well remove it. I have removed green toning using VerdiCare, but, once again I will let [USER=17261]@BadThad[/USER] address that. BTW, sodium sesquicarbonate is the accepted treatment for bronze disease as you would have seen if you had been on here for awhile.[/QUOTE]</p><p><br /></p>
[QUOTE="Kentucky, post: 2871904, member: 33176"]Then ask another one. I am an organic chemist and as such know more about organic chemistry than inorganic chemistry. Verdigris is a loose term for corrosion on copper and can be copper acetate, copper chloride or copper carbonate (guess which acid copper carbonate comes from...drumroll) or a combination of any of these, or other copper containing compounds. I think [USER=17261]@BadThad[/USER] can speak to this much better than me, but it's kind of like the difference between tarnish and toning. If you like it, it's toning...if you don't like it, it's tarnish. If you have a green coloration on a coin that is stable, it's a patina called verdigris, if it has a tendency to spread, it's bronze disease. Green toning on copper coins makes me uneasy and I would just as well remove it. I have removed green toning using VerdiCare, but, once again I will let [USER=17261]@BadThad[/USER] address that. BTW, sodium sesquicarbonate is the accepted treatment for bronze disease as you would have seen if you had been on here for awhile.[/QUOTE]
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