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<blockquote data-quote="Pbartender" data-source="post: 4631645" data-attributes="member: 7533">Mr. Zocchi makes a few particular mistakes...To make a perfectly random die, you need all the faces and edges to be perfectly uniform. Sharp edge are NOT required, so long as the rounded edges are all perfectly uniform with each other.&nbsp; Granted... Sharp edges are much, much easier to make uniform.&nbsp; Likewise, the faces should all be of the same size, shape and flatness -- there, he truly is in the right and does take the advantage.Also, the center of mass of the die must be in the exact geometrical center of the die.&nbsp; No matter what Mr. Zocchi says, ANY blemish -- even his little sprue mark -- makes a difference.&nbsp; His dice may stack perfectly, but they will tend to roll toward whatever number is opposite the divot.&nbsp; For that matter the numbers engraved on the dice themselves can make a difference.&nbsp; A &quot;20&quot; sits opposite of the &quot;1&quot;, but engraving a 20 shaves a lot more material out of the die than engraving a &quot;1&quot;, therefore, even perfect dice will tend to roll high, on average (the lower numbers tend to have more mass on their sides than the higher numbers).</blockquote>

[QUOTE="Pbartender, post: 4631645, member: 7533"] Mr. Zocchi makes a few particular mistakes... To make a perfectly random die, you need all the faces and edges to be perfectly uniform. Sharp edge are NOT required, so long as the rounded edges are all perfectly uniform with each other. Granted... Sharp edges are much, much easier to make uniform. Likewise, the faces should all be of the same size, shape and flatness -- there, he truly is in the right and does take the advantage. Also, the center of mass of the die must be in the exact geometrical center of the die. No matter what Mr. Zocchi says, ANY blemish -- even his little sprue mark -- makes a difference. His dice may stack perfectly, but they will tend to roll toward whatever number is opposite the divot. For that matter the numbers engraved on the dice themselves can make a difference. A "20" sits opposite of the "1", but engraving a 20 shaves a lot more material out of the die than engraving a "1", therefore, even perfect dice will tend to roll high, on average (the lower numbers tend to have more mass on their sides than the higher numbers). [/QUOTE]

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