[meteorite-list] Issue with etching via ferric choride

[R N Hartman]

Ferric is a deeper more contrasty etch than nitric and gives a more pleasing 
etch.  It can be used as an alternative to a nitric etch.  We use it all the 
time and it is the only etchant we use.  And its easier to obtain and handle 
than nitric.  See our article ETCHING IRON METEORITES (The Myth of Nitric 
Acid) in Meteorite Times, November, 2002: 
http://www.meteorite-times.com/Back_Links/2002/November/index.htm

Ron Hartman

----- Original Message ----- 
From: "R N Hartman" <rhartman04 at earthlink.net>
To: <mccartney at blackbearddata.com>; "MeteoriteList" 
<meteorite-list at meteoritecentral.com>
Sent: Thursday, October 29, 2009 4:33 PM
Subject: Re: [meteorite-list] Issue with etching via ferric choride


> Hello McCartney (and all):
>
> Yes,  the etch happens very quickly and you need to terminate it by a 
> quick wash under running water.  Follow with a rinse in distilled water if 
> you want to but we never do and it works fine.  You don;t have to 
> neutralize it, just wash it off VERY FAST.  In fact, I use running water 
> to slow down the process as I am doing it, especially if I need to etch 
> one section of a surface more. There is a bit of a technique - just 
> practice and you will do well.  If yo are getting staining your washing is 
> incomplete.
>
> Ron Hartman
>
> ----- Original Message ----- 
> From: "McCartney Taylor" <mccartney at blackbearddata.com>
> To: "MeteoriteList" <meteorite-list at meteoritecentral.com>
> Sent: Thursday, October 29, 2009 2:58 PM
> Subject: [meteorite-list] Issue with etching via ferric choride
>
>
>> Having a bit of a problem on some etch jobs and having to re-etch a few
>> specimens.
>>
>> How do you rinse/neutralize your ferric after the etch?  I'm getting
>> remnant staining and sometimes corrosion. I'm doing something wrong.
>>
>> Any ideas?
>>
>> -mt
>>
>>
>>
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