Message:

<p>[QUOTE=&quot;Jaelus, post: 3174104, member: 46237&quot;]Acetone does not affect the metal itself on any coin, but I&#039;ve seen a strange effect on probably a dozen aluminum coins. Mint state aluminum coins come out of the acetone with cloudy white splotches (aluminum oxide is white).</p><p><br /></p><p>When the coin is wet with the acetone the surfaces look normal, but as the acetone evaporates it leaves behind the white cloudy splotches. You can put the coin back into the acetone and remove it again and change the effect somewhat as it&#039;s dependent on the pattern of how the acetone evaporates. You can significantly reduce this effect if you dry the coin rapidly after removing it from the acetone (as with forced air from a fan). If the acetone evaporates simultaneously from the entire face of the coin it hardly does this.</p><p><br /></p><p>I have no explanation as to what causes it. I&#039;ve made sure to use clean acetone on aluminum as well to see if it was contaminants from other coins and it didn&#039;t make a difference. At this point, I&#039;ve stopped using acetone on aluminum coins and only use xylene on aluminum.[/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