[meteorite-list] Cleaning Scale off Stonys

From: Kevin Forbes <vk3ukf_at_meteoritecentral.com>
Date: Tue Jan 3 08:55:08 2006
Message-ID: <BAY113-F2FB6856CA484C783467A1992C0_at_phx.gbl>

Hi Pete and list, interesting read this one, just an untried thought after
years of cleaning ancient coins now and then, the caliche is a carbonate, I
am assuming, it should dissolve rapidly in HCl or Hydrochloric acid, dilute
to slow it. Also, I had success on certain coins removing bad stuff by
heating and quenching in water, SSSSSSS and it flaked off.
Cheers, Kevin.

>From: "Pete Pete" <rsvp321_at_hotmail.com>
>To: meteorite-list_at_meteoritecentral.com
>Subject: [meteorite-list] Cleaning Scale off Stonys
>Date: Mon, 02 Jan 2006 17:45:34 -0500
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>Hello, List,
>
>...so quiet in here...everyone still hung-over, eh?
>
>A while ago I posted a request for any suggestions to make getting scale
>off of stone meteorites any easier, without a response.
>
>I tried a few things myself and I'll pass on the results for anyone who is
>interested:
>
>De-scalers like CLR or Limeaway are messy, smelly and potentially
>dangerous, even in a diluted form down to 25% with distilled water - and it
>changed the appearance of the surface somewhat.
>
>A furnace humidifier "scale-be-gone" solution was the same disappointment.
>
>
>Hydrogen Peroxide, however, was a definite help, and at the household 3%,
>it's relatively safe.
>
>I submerged the intended stone in the peroxide for about an hour, and while
>keeping it wet I started cleaning.
>It is still a meticulous task - I still needed to use the dental picks, but
>the scale comes off a lot easier and in bigger chips, and doesn't appear to
>harm the meteorite.
>
>I soak the stones in alcohol when I'm done to displace the water.
>
>I'll try 10% later, and if there's an marked advange I'll post the
>results...unless someone else tries it first...
>
>I suggest you wear disposable gloves, though, as the stuff will bleach your
>fingertips.
>
>Any input or further suggestions would be appreciated.
>
>Cheers,
>Pete
>
>
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Received on Tue 03 Jan 2006 08:53:42 AM PST