Message:

<p>[QUOTE=&quot;V. Kurt Bellman, post: 2933879, member: 71723&quot;]The question is not whether it goes all the way back. Clearly it can&#039;t for all the reasons stated. The question is scale. Can it be detected at the scale at which coins are graded? I&#039;ll tell you this, NO TPGS has been able to detect any &quot;dip&quot; of my formula yet - not on a business strike, not on a brilliant proof. I&#039;m still batting 1.000. And that includes a coin (just one) that was in the dip for AN HOUR! The working difference between a dip using citric acid vs. sulfuric acid is both REAL and IMPORTANT![/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