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

["Jeff Anderson-Lee" <jonah@cs.berkeley.edu>]

greg emery wrote:

>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.
>

Avoid the rain water if you live anywhere near a populated area.  It 
will be full of pollutants washed out of the atmosphere on it's way 
down.  Come to think of, they are finding pollutants in the ice at the 
south pole these days, so its probably best to just skip the rain water 
altogether regardless of where you live.  That's advice that's seen 
better days. 

Jeff Anderson-Lee
Sacramento, CA

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