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<p>[QUOTE=&quot;Insider, post: 2302042, member: 24314&quot;]Hairline:</p><p><br /></p><p>1. A very slender line.</p><p>2. The lower edge of the hair, esp. along the upper forehead.</p><p>3. You&#039;ll know it when you see one.&nbsp; Couldn&#039;t resist.</p><p><br /></p><p>Now as I said previously, the #1 entry in a dictionary is usually the best.</p><p><br /></p><p>If you wish to see a hairline take a look at a few fresh, &quot;raw&quot; proof coins.&nbsp; Tip them at the same time you turn them through 360 degrees under bright light in a dark room. It&#039;s best to use a nice new coin because then you will probably see one extremely fine shiny scratch which flashes out then disappears as you keep turning the coin.&nbsp; I said scratch because a hairline is a micro-scratch.&nbsp; Once you find one (or several) on a proof, you can start looking for the same micro scratches on MS coin&#039;s (much harder to see).&nbsp; This next is important. Usually, hairlines lower a proof more than a MS because the are more noticeable.&nbsp; And...with enough magnification ...hairlines can be found on virtually all coins.&nbsp; Again it is a matter of degree.&nbsp; A few random (this way and that) hairlines usually are OK; but when you see a patch of them very close together and sometimes covering the surface of the entire coin it usually indicates &quot;mechanical&quot; abrasion (cleaning, buffing, improper drying, etc.) in some degree.&nbsp;&nbsp; </p><p><br /></p><p>There is much more to add to this about to classify them, etc. but this will start you out.&nbsp; Nothing has a simple answer.[/QUOTE]</p><p><br /></p>

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