[600MRG] restoring old crystals ??

[Neil Klagge]

Thanks Ken. Ur comment "*It would be an excellent cleaner for the
crystals*" is just what I want to use it for. It might just activate
the crystal
enough to oscillate.

Neil

On Tue, Feb 5, 2013 at 3:45 PM, Kenneth G. Gordon
<kgordon2006 at frontier.com>wrote:

> On 5 Feb 2013 at 17:28, Joseph Krzeszewski wrote:
>
> > > Hydrofluoric acid works too.. but it is totally dangerous
> > > and these days probably not easily obtained.
>
> You may be able to get a small quantity from a University chemical stores.
> Transporting it is a problem of course: it cannot be stored in glass
> bottles.
>
> >
> > You could try "Whink" brand rust stain remover. It is about 3.5%
> > hydrofluoric acid and available in my local grocery store.
>
> Although it would probably work to etch crystals, it would also probably be
> very slow. It would be an excellent cleaner for the crystals in most cases.
>
> However, rubber gloves and eye protection are pretty much required.
>
> As I understand it, HF will penetrate skin and actually dissolve bone
> inside
> the flesh.
>
> > I was amazed that anything with hydrofluoric acid was available to the
> > general public.
>
> Yes. I thought so too. "Whink" does an excellent job of removing rust
> stains
> from practially everything, including clothes....which surprised me when I
> read the directions on the bottle.
>
> I keep one or two bottles of it here.
>
> Ken W7EKB
>
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