[meteorite-list] Issue with etching via ferric choride

From: Linton Rohr <lintonius_at_meteoritecentral.com>
Date: Thu, 29 Oct 2009 17:29:54 -0700
Message-ID: <0F46318059B24D3B8B0EA74F53AB2219_at_D190TH71>

It sure would, Eric.
I should point out though, that there is a PowerPoint presentation available
on the subject under the downloads category on the IMCA site. It is entitled
Meteorites 301, and is a follow-up to 201 and 101, as you would expect. I
just downloaded them all last week, and may use the first two for a upcoming
Boy Scout presentation.
I should also point out that I have not *yet* done any etching, so the
contents of this PowerPoint program pretty much match the extent of my
knowledge on the subject! ;^)
Linton

----- Original Message -----
From: "Meteorites USA" <eric at meteoritesusa.com>
To: "R N Hartman" <rhartman04 at earthlink.net>
Cc: <mccartney at blackbearddata.com>; "MeteoriteList"
<meteorite-list at meteoritecentral.com>
Sent: Thursday, October 29, 2009 5:04 PM
Subject: Re: [meteorite-list] Issue with etching via ferric choride


> Hi McCartney, Ron, Listees,
>
> This might actually be a good topic for an article on the new Meteorite
> Wiki. Perhaps an experienced and generous person would be willing to
> extend the time to write an extensive and detailed article on it including
> information on preservation and stabilization. I'm sure others would love
> to learn the process. I would be will to add a few of my photos to the
> document and release them into the public domain for all use. What do you
> think?
>
> Regards,
> Eric Wichman
> Meteorites USA
>
>
>
>
>
> R N Hartman wrote:
>> 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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>>
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>
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Received on Thu 29 Oct 2009 08:29:54 PM PDT