Message:

<p>[QUOTE=&quot;Michael K, post: 26350001, member: 78298&quot;]While I am not a fan of AI this is what AI says:</p><p>&quot;Black spots on copper coins are typically a form of oxidation or corrosion, often referred to as carbon spots, though they don&#039;t necessarily contain carbon. These spots are often caused by sulfur compounds reacting with the copper in the coin, especially when the coin&#039;s alloy has uneven copper distribution. While commonly called carbon spots, they are more accurately described as copper spots or sulfur spots.&quot;</p><p>If this is true, I don&#039;t think any conservation or masking of these spots is going to help as the coin is permanently damaged from the corrosion.</p><p>If a company can reverse corrosion and make the coin acceptable to graders and not details, that would be a multi million dollar process.[/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