Message:

<p>[QUOTE=&quot;GDJMSP, post: 5193811, member: 112&quot;]Although there has been much speculation about what causes milk spots, absolutely no one has ever determined what causes them. But one thing is certain, they are not caused by the washing of the planchets. If it was, whatever substance it was in the wash solution would be on the surface of the coin and thus it could be safely and fairly easily removed. But since there is nothing that safely removes milk spots - whatever it is that&#039;s causing them - it&#039;s NOT on the surface. Milk spots are not on the surface - they are inside the metal itself.</p><p><br /></p><p>Milk spots are caused by something in the metal itself, but nobody has been able to figure out what it is or how it gets there. Reasoning would suggest that it&#039;s an impurity of some kind, similar, in nature at least, to the impurities that cause carbon spots and or copper spots - both of which are also in the metal itself.</p><p><br /></p><p>Quite a few years ago PCGS offered a $25,000 reward to anyone who could come up with a way to safely remove milk spots. The reward has never been claimed, and to the best of my knowledge it still stands.[/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