Re: [ATM] Does exposed Pyrex lose polish over time?

["Richard Schwartz" <richas@earthlink.net>]

I tested this idea.  I smeared some vaseline on a microscope slide and then
swabbed it with concentrated HNO3.    You are right!   The HNO3 did nothing
to the vaseline, and neither did the tap water I rinsed with.   So the
cleaning process must require distilled de-ionized water.  I burned the
cotton swab in the fireplace, and it was really cool how it flared up!  I
bet you could make firecrackers outta that stuff.

. . . Richard


> [Original Message]
> From: greg emery <glass_grinder@yahoo.ca>
> To: <atm@atmlist.net>
> Date: 5/3/2004 4:47:21 AM
> Subject: Re: [ATM] Does exposed Pyrex lose polish over time?
>
>  Hello All:
>
> If it is a combination of chemicals and dirt losely in
> contact with the surface or adsorbed to the surface
> then maybe a swabbing with conc. nitric acid ( which I
> would repeat 1 or 2x) then copius rinsing with  water
> ( distilled deionized is best, followed in order of
> preference by reverse osmosis, then distilled, then
> rain water and lastly tap water).
>
> This should remove any and all films, surface
> contaminants, oils, greases and a multitude of
> inorganic materials.
>
>
>
> ttfn
> greg
>
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