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Washington Quarters: Proof vs. Business Strikes
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<p>[QUOTE="BUncirculated, post: 1505354, member: 29581"]They're the same designs; however, as Doug pointed out they are not the same dies. </p><p><br /></p><p>The proof dies are prepared differently than the dies used to strike business strikes. The planchets used for proof coins go through a process that the planchets used for business strikes are not put through. </p><p><br /></p><p>Specifically, the proof planchets are placed in a drum with a mild cleaning solution mixed with water, and steel beads. They're then spun in that drum for about 20 minutes or so, and the steel beads are what gives the planchets a smooth, mirror finish. </p><p><br /></p><p>Business planchets don't go through that.[/QUOTE]</p><p><br /></p>
[QUOTE="BUncirculated, post: 1505354, member: 29581"]They're the same designs; however, as Doug pointed out they are not the same dies. The proof dies are prepared differently than the dies used to strike business strikes. The planchets used for proof coins go through a process that the planchets used for business strikes are not put through. Specifically, the proof planchets are placed in a drum with a mild cleaning solution mixed with water, and steel beads. They're then spun in that drum for about 20 minutes or so, and the steel beads are what gives the planchets a smooth, mirror finish. Business planchets don't go through that.[/QUOTE]
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Washington Quarters: Proof vs. Business Strikes
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