[meteorite-list] Fwd: Re: Rusty droplets

From: Thomas Webb <webbth1_at_meteoritecentral.com>
Date: Fri, 8 Jun 2007 12:04:17 -0700 (PDT)
Message-ID: <20070608190417.53335.qmail_at_web36207.mail.mud.yahoo.com>

--- Thomas Webb <webbth1 at yahoo.com> wrote:

> Date: Fri, 8 Jun 2007 09:55:35 -0700 (PDT)
> From: Thomas Webb <webbth1 at yahoo.com>
> Subject: Re: [meteorite-list] Rusty droplets
> To: mark ford <markf at ssl.gb.com>,
> meteorite-list at meteoritecentral.com
>
> 'Iso' means "equal"!
> Thomas
>
>
> mark ford <markf at ssl.gb.com> wrote:
> Iso means 'pure' ...
>
> Mark
>
> -----Original Message-----
> From: Pete Pete [mailto:rsvp321 at hotmail.com]
> Sent: 08 June 2007 13:13
> To: mark ford; GiovanniSostero at libero.it;
> Meteorite-list at meteoritecentral.com
> Subject: Re: [meteorite-list] Rusty droplets
>
> Mark wrote:
> ..."Iso-alcohol (pure ethanol)"...
>
> Hi, all,
>
> I'm not a chemist, but the way you wrote that, it
> might be
> misinterpreted by
> some to identify Isopropyl alcohol is the same as
> Ethanol, which it's
> not.
> The connection to each other is that both have been
> referred to as
> "rubbing
> alcohol".
>
> Cautions when using either with meteorites:
>
> Don't use the 70% isopropyl - the 30% is water,
> which is what you want
> to
> avoid. I use the 99% isopropyl and 95% ethanol
> without any ill effect
> seen
> on the stones.
>
> They are more flammable in these purer forms, so
> ventilate!
>
> The fumes of isopropyl are poisonous! Ventilate.
>
> Cheers,
> Pete
>
>
>
>
> From: "mark ford"
> To: "giovannisostero"
> ,
> Subject: Re: [meteorite-list] Rusty droplets
> Date: Fri, 8 Jun 2007 09:14:57 +0100
>
> Hi Giovani,
>
> Yes firstly take them out of plastic! Any
> moisture/chemicals trapped in
> the rock will stay in the rock if it is in plastic,
> you only want to put
> dry, stable material into plastic boxes, (or use
> dessicant/silica gel
> with the rock and recharge it regularly).
>
> As Adam suggested you can also use Iso-alcohol (pure
> ethanol) it's good
> for getting rid of moisture in extreme cases but
> make sure it is 'pure
> anhydrous alcohol' or you will be putting more water
> in than you take
> out! - also gently warm the slice afterwards to
> drive off any moisture
> then sand with very very fine sanding paper.
>
> They also preferably need to be kept somewhere dry
> like inside a cabinet
> with dessicators inside, or better still a
> dehumidifier.
>
> Most slices reach a stable point eventually once you
> have done this!
>
> Best
> Mark Ford
>
>
>
>
>
> -----Original Message-----
> From: meteorite-list-bounces at meteoritecentral.com
> [mailto:meteorite-list-bounces at meteoritecentral.com]
> On Behalf Of
> giovannisostero
> Sent: 07 June 2007 19:15
> To: meteorite-list
> Subject: [meteorite-list] Rusty droplets
>
> Hi,
> I noticed that a coupled of slices (Ghubara and NWA
> 869) I bought few
> months ago from two different dealers, are producing
> some small liquid
> droplets of rusty appearance. After cleaning, the
> droplets develope
> again in a matter of few weeks. Any idea about how
> to cure it? The
> samples are stored in plastic envelopes but without
> any particular
> desicant.
> Cheers,
> Giovanni
>
>
>
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Received on Fri 08 Jun 2007 03:04:17 PM PDT