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<p>[QUOTE=&quot;desertgem, post: 3530231, member: 15199&quot;]I would think that if such a solution was known at ANYTIME to be SOMEWHAT effective it would still be on sell as is Nic-A-Date.&nbsp; And it is not , perhaps due to the chemicals danger in use or transportation . Cyanide can be a great coin chemical , once found in Hardware stores , especially in rural areas, but no more !</p><p>&nbsp;&nbsp; &nbsp;&nbsp; People are use to hydrogen peroxide in the home in low concentration of about 5% and it is useful for certain tasks without very high danger for people who can read directions, but some with no chemistry experience ask on other forum where they can get the explosive rocket fuel 90%...which makes me wonder what their hobby happens to be.</p><p>&nbsp;&nbsp; &nbsp; Nic-A-Date works more on metallurgy effects due to the much higher pressure for nickel metal coins,&nbsp; Copper, silver , and gold coins use lower pressure because they are softer by a factor of&nbsp; 5-15 X&nbsp; depending on the alloy mix.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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