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<p>[QUOTE=&quot;josh&#039;s coins, post: 1947530, member: 51487&quot;]to produce a fake silver 1 oz bar within an uncertainty of .1g would be very difficult. If you know the chemistry of metals you would know that Ag or Silver is very nonreactive and will only form oxides which can be burned off from intense heat. In the process of melting down silver a human that is tending to the machine needs to make sure that the proportions are correct to make each bar exactly 1 OZ. Therefore a human error of +- .2 will occur. Another factor is that the furnace has not been heated to the proper temperature which will allow some of the oxygen to remain bonded with the silver which will give you the extra .1g this could be human error but it may also be mechanical.[/QUOTE]</p><p><br /></p>

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