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<p>[QUOTE=&quot;Conder101, post: 1759011, member: 66&quot;]Very true, with the one comment that if the coin is in direct contact with the object it is that much closer to the gases and can have a slightly higher concentration of reactants.</p><p>&nbsp;</p><p>One way to speed up toning is to use a closed environment with the coin and reactive object (Plus some moisture) inside and then elevate the temperature so the reactive object outgasses more.&nbsp; The heat causes more outgassing and chemical reactions (the toning reactions) as a rule proceed faster at higher temperatures.[/QUOTE]</p><p><br /></p>

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