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<p>[QUOTE=&quot;rysherms, post: 1769554, member: 46631&quot;]umm, no. that would be incorrect.</p><p>&nbsp;</p><p>toning is a result of oxidation. many chemicals can cause oxidation at different rates. the rainbow effect is the differing thickness of the oxidation which reflects/refracts light in the visible light spectrum. nothing can prevent oxidation as it can even be caused by LIGHT reacting with surface molecules. i doubt your coin armour has the ability to deflect all forms of electromagnetic radiation....correct? if it does, you should be in the radiation field. plastic lined with metal on the thickness that your bags are simply cannot do this.</p><p>&nbsp;</p><p>tarnish is from sulfur. period. if you are argue this it just proves how little understanding of chemistry you have and how likely it is you are selling expensive ziplock bags. tarnish is defined as SILVER SULFIDE.</p><p>&nbsp;</p><p>tarnish is gray/black. it is silver and sulfur (well hydrogen sulfide to be exact).</p><p>&nbsp;</p><p>toning is SILVER OXIDE. as in, oxygen that has been pulled off of other chemicals that it bonds stronger to the silver molecules.</p><p>&nbsp;</p><p>i would hope that you did not put too much time or money into this as from a MATERIALS ENGINEERING GRADUATE standpoint, you do not seem to understand the very basic chemical properties relevant to your product and it&#039;s abilities. if your plastic bags are lined with a nano to micro layer of a metal, i am assuming copper, literally opening the bag the first time and introducing the ambient air around all of us would react off all of the free radicals on it&#039;s surface. you would have to insert the coins into it in a vacuum....and could never open them again. your product appears to be the same thing as a thermal blanket (plastic with a nano coating of aluminum) only with...copper?</p><p>&nbsp;</p><p>bottom line, if you put a coin in your product, and in a ziplock, barring that the ziplock doesnt have PVC, there would literally be NO difference. i am not trying to be mean, rude, etc. it is just chemistry sir.[/QUOTE]</p><p><br /></p>

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