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<p>[QUOTE=&quot;desertgem, post: 3494046, member: 15199&quot;]If this is an experiment , I would</p><p>1. rinse&nbsp; the coins and inside of the bottle and lid with acetone and pour out excess to remove contaminants ,</p><p>2. Use &#039;rubber bands&quot; made of synthetic rubber ( neon colors usually) as rubber bands have differing amounts of sulfur.</p><p>3. Since matches do not list percentages of phosphorus or sulfur ( and which compound) I have bought pure sodium sulfide on Amazon to provide the sulfides..</p><p><br /></p><p>One should narrow down the possible active agents as much as possible if you ever wish to repeat experiments at a later time.&nbsp; IMO&nbsp;&nbsp; Jim[/QUOTE]</p><p><br /></p>

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