Message:

<p>[QUOTE=&quot;Colonialjohn, post: 2124482, member: 57741&quot;]Lehigh let me check my library. Since the historical and counterfeit coins I collect - I really do not study in depth - the topic of toning. I understand the principle causes and the general compounds in questions involved whether its a silver or copper surface but beyond that ...&nbsp; When I think of stress fractures there is discussions like hydrogen embrittlement and such which has been studied particularly in antiquities as well as in coins. But does strees fractures promote higher? toning rates? Granted - from this thread it would be an interesting side by side on a confirmed AT vs. NT at the microscopic level. But with all due respect - if stress areas tone faster - so what?</p><p>Will check and report back ... ONE THING IS FOR CERTAIN YOU WILL LIKE MY NEW BOOK IN 2017. Its light years above Weimer ... IMO &lt;VVBG&gt;.</p><p>&nbsp;</p><p>JPL[/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