[meteorite-list] etching?

From: harlan trammell <skyrox_at_meteoritecentral.com>
Date: Thu Apr 22 10:27:50 2004
Message-ID: <BAY1-F751jr0W3Qx4xV0000f93d_at_hotmail.com>

<html><div style='background-color:'><DIV>
<P>very interesting- if you polish a skyrock with a soft lap , the pattern is often visible<BR><BR></P></DIV>
<DIV></DIV>&gt;From: william anderson <CASTLEWH1_at_YAHOO.COM>
<DIV></DIV>&gt;To: meteorite-list_at_meteoritecentral.com
<DIV></DIV>&gt;Subject: [meteorite-list] etching?
<DIV></DIV>&gt;Date: Mon, 17 Nov 2003 05:08:28 -0800 (PST)
<DIV></DIV>&gt;Just had a bizarre thought that I have no answer to.
<DIV></DIV>&gt;Has anyone ever tried bringing out the widmanstatten
<DIV></DIV>&gt;pattern with a chemical free etch? I was remembering
<DIV></DIV>&gt;a fellow who liked to "frost" the busts of coins using
<DIV></DIV>&gt;a scaled down sandblasting outfit. He would mask the
<DIV></DIV>&gt;unetched areas with rubber cement. However if the
<DIV></DIV>&gt;taenite and kamacite have different hardnesses, the
<DIV></DIV>&gt;etch would be differential, so the pattern would
<DIV></DIV>&gt;emerge, and would happen without much fuss? Who knows
<DIV></DIV>&gt;what it would look like, but the visual desirability
<DIV></DIV>&gt;of an chemical etch might just be borne of no other
<DIV></DIV>&gt;alternatives. At the least there would be no great
<DIV></DIV>&gt;need for neutralizing the chems away. Just a random
<DIV></DIV>&gt;thought. Nice day to you all.
<DIV></DIV>&gt;Bill Anderson
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Received on Mon 17 Nov 2003 05:17:31 PM PST

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