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

["Richard Klappal" <klappal@xnet.com>]

There shouldn't be any changes in the surface, but air pollution films can
be nasty to get rid of.  When you washed it, did the water bead up, or flow
of in a sheet leaving no droplets to dry?  It may take several washings with
dilute dishwashing detergent alternated with pure isopropyl alcohol washes
to get all film removed.

Just make sure the isopropyl doesn't have any lanolin or other cosmetics in
it since it is most commonly available as "rubbing alcohol"


Rich


-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf
Of Jeff Anderson-Lee
Sent: Wednesday, 28 April, 2004 12:23
To: atm@atmlist.net
Subject: Re: [ATM] Does exposed Pyrex lose polish over time?


Bob May wrote:

>Theory says yes but reality is no for glasses like pyrex.  It will take a
>very long time to make the corrosion of pyrex to be visible to the eye.
>
>
Besides you can always put it in a tester and check the figure.  If
there is significant degradation, you would probably see it under a
Foucault test with a narrow slit.  If you can't see it, it probably
doesn't matter.

Jeff

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