[modeleng] Re: Pickle
- From: "Ron Head" <ron.head@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 6 Oct 2004 21:27:52 +0100
Hi Tim
Thanks for your kind offer, however on rummaging around the garage I found a
soil testing kit (the sort where you add a lime solution to a soil sample
and compare the colour with a chart). Do you reckon I could use this? If
so, what ratio of acid to lime should I use?
Regards
Ron
----- Original Message -----
From: "Tim Rickard" <the_viffer@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, October 06, 2004 10:41 AM
Subject: [modeleng] Re: Pickle
> Hi Ron thanks for the welcome (and Dave too).
>
> Yes I'm pretty certain (without actually having tried) it that caustic
> would
> be OK. You'd want to be very wary about adding it. Certainly a job for old
> clothes and goggles. You should get a light blue precipitate of copper
> hydroxide which you could just stick in the bin. One of the problems with
> using caustic is getting to somewhere approaching neutrality. I think
> flushing a mildly alkali or mildly acidic solution down the drain with
> lots
> of water is a lot more acceptable than doing the same with a neutral one
> with lots of metal ions dissolved in it. One thing you could do is try
> dripping a bit on some bicarb: if it fizzes it is still acidic. I expect
> lurking around at home there is some universal indicator paper (it shows
> all
> pH's not just a change between acid and alkali) and if you want to ping me
> offlist wih your address I will send you some if we have got any.
>
>
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