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<p>[QUOTE=&quot;calcol, post: 2762284, member: 77639&quot;]Doing a believable theoretical calculation is probably not possible.&nbsp; The properties of liquids and metals when impacted rapidly with huge force, as occurs with high speed coining presses, likely need to be determined empirically (i.e. by experimenting).&nbsp; Speed as well as pressure would be a factor.&nbsp; With an old, hand-operated screw press, even thick grease might spew-out without leaving marks on the metal.&nbsp; But modern presses apply tons of force hundreds of times per minute, and die velocity at impact must be very high.</p><p><br /></p><p>I know pure water evaporates quickly outside on warm days in Denver (I was raised there).&nbsp; But how about some spilled cola inside the Philly mint?&nbsp; Wet or sticky planchets likely go through presses once in a while.</p><p><br /></p><p>Cal[/QUOTE]</p><p><br /></p>

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