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<p>[QUOTE=&quot;Kentucky, post: 24697413, member: 33176&quot;]More than a year ago I got into a disagreement [USER=112]@GDJMSP[/USER] over the PVC contamination.&nbsp; Many people blame the plasticizer in the PVC which is dioctyl phthalate.&nbsp; Dioctyl phthalate is a colorless, odorless viscous oil-like liquid with a very high boiling point.&nbsp; The odor you detect when opening a new shower curtain (or batch of 2x2 PVC flips) is actually the vinyl chloride monomer that is still present in the polymer.&nbsp; Doug maintained that coins stored next to plasticized (soft) PVC products would pick up the PVC residue.&nbsp; Since PVC is a polymer, the only way coins could pick up what we call PVC contamination is by direct contact with a PVC product or the products of decomposition of the PVC which includes HCl (Hydrogen Chloride which, when dissolved in water becomes hydrochloric acid).&nbsp; My thought for this contamination is that coins can pick up the plasticizer by direct contact as it &quot;bleeds&quot; out of the polymer.&nbsp; This would give a sticky coating which would be prone to pick up most anything that is around, including traces of the HCl from the decomposing PVC. The HCl could react with the coin material to give chlorides which could cause the color.&nbsp; Whew...</p><p><br /></p><p>Now Doug sent me a package of PVC flips on Feb. 15, 2022 and I initiated the experiment.&nbsp; I put the opened and fanned-out PVC flips in a larger plastic container along with a Sunshine Minting 999 silver round and a nice shiny 2015 D cent sitting on the plastic package the flips came in.&nbsp; I put another silver round and another 2015 D cent in a separate container and stored them in my Southern California garage.&nbsp; Not the most severe storage conditions, but the best I could do.&nbsp; I am now going to get them out and let everyone see what has happened.&nbsp; Stay tuned.</p><p><br /></p><p>[USER=5233]@CamaroDMD[/USER] didn&#039;t mean to hijack your post, but thought you would find this interesting.&nbsp; BTW, the acetone should remove the schmutz.[/QUOTE]</p><p><br /></p>

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