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<p>[QUOTE=&quot;Kasia, post: 2057520, member: 31533&quot;]I don&#039;t know if this will answer your question, but it also says this: </p><p><br /></p><p>&quot;As you can see, business strike copper-nickel coins are mostly copper in reality. Copper is typically rather soft (ductile) compared to most other metals. The nickel contained in the copper-nickel clad composition adds a degree of hardenability and wear resistance. The silver clad coins themselves contain approximately 60% copper as well. Silver too is ductile by nature, and therefore the silver clad coins were softer than the copper-nickel clad counterparts. This allowed the silver uncirculated and proof coins to be stuck in a higher relief and still maintain crisp details, as the metal “flowed” much more readily into the die cavities.&quot;</p><p><br /></p><p>But in reality, the W-1 they are talking about is the steel used for the die, not the coin planchet. The coin planchet simply is one of two compositions, and depending on which it is, can provide either a better or worse relief. Here&#039;s the difference between the two used (same source)</p><p>&quot;Metal compositions for Eisenhower dollar planchets were the following:</p><p><br /></p><p><b>Copper-Nickel Clad:</b> inner core of copper sandwiched between two outer layers of copper-nickel alloy comprised of 25% nickel and 75% copper. Used for all circulating business strikes and clad proofs.</p><p><br /></p><p><b>Silver Clad:</b> inner core of 20% silver and 80% copper alloy sandwiched between two outer layers of 80% silver and 20% copper alloy (± a small tolerance on all percentages given). Popularly known as 40% silver clad. Used for silver uncirculated and silver proof coins.&quot;[/QUOTE]</p><p><br /></p>

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