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<p>[QUOTE="Just Carl, post: 263624, member: 4552"]Steps:</p><p>Heat the copper wire in the flame of the torch until it burns cleanly. This serves to burn off any unwanted residues that might be on the wire. Make sure that you hold the wire with pliers or an insulator to avoid injury. Touch the hot wire to the holder. Some of the holder will melt and be stuck to the wire. Be sure to hold the holder close to the air intake of the torch in order to draw away the fumes from the burning plastic. Put the wire back into the flame. If the flame bums yellow or clear, no PVC present. If the flame burns bright green, then some PVC is present.</p><p><br /></p><p>True but but other chemicals also give off similar results. This test is simple but not necessarily accurate. I've done this numerous times in our labs and have numerous different results. Zip lock bags had similar results but all manufacturers contacted stated no PVC was present and other chemicals also show similar results. </p><p>Again, the simple way is to contact the manufacturer. If you don't have the original package they come in, contact the person selling them and say you want the manufacturers name. It is against the law to falsely state a products composition erroneously and manufacturers will not risk a law suite over such a simple request.</p><p>Regardless of the presense of PVC or not it is not the PVC that may effect a coin. PVC is a stable covalent compound that will not melt until 212 degrees F. If your coins are exposed to that temperature you have other things to worry about. It is the additive is PVC to make it more flexable that is the problem and as they leak off, there is less and less all the time. You can only leak off so much of anything from anything until there is not more left.[/QUOTE]</p><p><br /></p>
[QUOTE="Just Carl, post: 263624, member: 4552"]Steps: Heat the copper wire in the flame of the torch until it burns cleanly. This serves to burn off any unwanted residues that might be on the wire. Make sure that you hold the wire with pliers or an insulator to avoid injury. Touch the hot wire to the holder. Some of the holder will melt and be stuck to the wire. Be sure to hold the holder close to the air intake of the torch in order to draw away the fumes from the burning plastic. Put the wire back into the flame. If the flame bums yellow or clear, no PVC present. If the flame burns bright green, then some PVC is present. True but but other chemicals also give off similar results. This test is simple but not necessarily accurate. I've done this numerous times in our labs and have numerous different results. Zip lock bags had similar results but all manufacturers contacted stated no PVC was present and other chemicals also show similar results. Again, the simple way is to contact the manufacturer. If you don't have the original package they come in, contact the person selling them and say you want the manufacturers name. It is against the law to falsely state a products composition erroneously and manufacturers will not risk a law suite over such a simple request. Regardless of the presense of PVC or not it is not the PVC that may effect a coin. PVC is a stable covalent compound that will not melt until 212 degrees F. If your coins are exposed to that temperature you have other things to worry about. It is the additive is PVC to make it more flexable that is the problem and as they leak off, there is less and less all the time. You can only leak off so much of anything from anything until there is not more left.[/QUOTE]
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