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Hi Lloyd, That's a relatively common first impression. In reality, as the coin's diameter is reduced, its thickness correspondingly increases in such a manner that the coin's total volume remains the same. Even though the work coil explodes and portions of the coil vaporize, there's no ablation of the coin. It has been demonstrated numerous times that the coin's mass remains the same. Thus the density and specific gravity of the coin also remain the same. See Figure 4 in the following MintErrorNews article to see the thickening effect: Other more in-depth explanations of the process can be found here: Although it may be hard to believe, it's only the invisible, but extremely powerful, magnetic fields interacting between the coin and the work coil that cause the coin to shrink as the work coil simultaneously explodes: action and reaction. On more valuable coins I sometimes use a thin plastic sleeve between the work coil and the coin to prevent vaporized copper and copper oxide from condensing onto the surfaces of the coin. This delicate plastic sleeve remains intact after the explosion, demonstrating that any compressive forces from the hot gases and plasma of the exploding coil are quite small. The powerful magnetic fields pass through the plastic sleeve as though it wasn't there. It's only the invisible, but irresistably strong, magnetic fields that do all the work to reshape the coin. Best regards, -- Bert --
: If the coins don't get denser, then they can't be shrinking. Moreover, is
: it not the case that the process is stripping away the surface of the
: coins, in an even manner, thus retaining the features but in a reduced
: size? The coil's disintegration is doing something other than
: compressing the coin, it is ablating the coin's surface in a uniform
: manner.
http://205.243.100.155/photos/Shrunken_Coins1.PDF
http://205.243.100.155/photos/shrinker5.pdf
http://205.243.100.155/frames/shrinker.html
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