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<p>[QUOTE=&quot;Kentucky, post: 2118454, member: 33176&quot;]Yes, it is the composition of the rubber band.&nbsp; Natural rubber has to be &quot;vulcanized&quot; which involves treating it with sulfur to cross-link the molecules and make it useable.&nbsp; It doesn&#039;t even have to be a gas.&nbsp; If you slap a polished piece of lead together with a polished piece of gold, you can detect gold that has migrated into the lead and vice-versa.&nbsp; A superior material for flips might be the plastic &quot;saran&quot;, but I don&#039;t know if anyone makes them.[/QUOTE]</p><p><br /></p>

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