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<p>[QUOTE="desertgem, post: 3886772, member: 15199"]Please read some science before experimenting. Acid REMOVES toning back to bare metal. Then the bare metals reacts with environmental chemicals for the staining /toning/corrosion. The salts that remain on the coin or environment can over time ( wks , months, etc. can cause the discoloration.</p><p><br /></p><p>Also urine isn't a standardized product, even from the same individual person. Some eat food which can cause an alkaline urine ( generally those who get stones), but also a varied diet can be now or not now. You need to test your urine if you are really doing this for science each time before the experiment. </p><p><br /></p><p>If it is just for laughs, it is better not to go that direction.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>
[QUOTE="desertgem, post: 3886772, member: 15199"]Please read some science before experimenting. Acid REMOVES toning back to bare metal. Then the bare metals reacts with environmental chemicals for the staining /toning/corrosion. The salts that remain on the coin or environment can over time ( wks , months, etc. can cause the discoloration. Also urine isn't a standardized product, even from the same individual person. Some eat food which can cause an alkaline urine ( generally those who get stones), but also a varied diet can be now or not now. You need to test your urine if you are really doing this for science each time before the experiment. If it is just for laughs, it is better not to go that direction. Jim[/QUOTE]
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