[meteorite-list] Alcohol + water + NaOH

From: Mendy Ouzillou <ouzillou_at_meteoritecentral.com>
Date: Thu, 12 Sep 2013 10:14:14 -0700
Message-ID: <B7381876-EE73-4E62-90C2-E3CC3A675CC1_at_yahoo.com>

Derek's recommendation brings up an interesting point. What is the function of the alcohol? Post etched irons are usually rinsed in distilled water anyways to remove the Nital, so why use alcohol at all?

Mendy Ouzillou

On Sep 12, 2013, at 8:35 AM, Derek Yoost <mineral at optonline.net> wrote:

I would use steam distilled water insted of alcohol. Less dangerous. Have had personal bad experance with nitol. If you use nitol, then keep in a ice bath to keep it stable.

Thanks, Derek.

Joshua Tree Earth & Space Museum <dorifry at embarqmail.com> wrote:

> Francesco:
>
> Do you mean sodium nitrate (NaNO3)?
>
> While we're on the topic, which solution of nitric acid works best for
> making nitol? The purest I can find seems to be 67.2%. What would be the
> ratio of alcohol added to make nitol?
>
> Phil Whitmer
> Joshua Tree Earth & Space Museum
>
>
> Hello, I have a roughly cutted Muonionalusta slice to make beatiful.
> I will grind, polishing and etching it ... and after for prevent rust and
> stabilize it I'm planning to use the method alcohol + water + NaOH .
> But I have few question:
>
> Ethanol at 96% works fine?
> I have to use distilled water or normal water?
>
> For 100ml of solution I have to use 70ml of ethanol and 30ml of water, is
> this proportion correct?
> How many grams (or spoons) of NaOh I have to use?
> How many days I have to leave the slice in the solution? 7-10 days? In this
> period I have to change the solution or the first potion works fine for all
> these days?
>
> And after? What I have to do? I have to wash it with ethanol and after dry
> up in oven, 80?C?
> After could I also put some rust prevent varnish?
>
> Any other tip are welcomed!!!
>
> Thanks a lot!!!
> Francesco!
>
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Received on Thu 12 Sep 2013 01:14:14 PM PDT