[Antennas] Re: OTC Glass Cleaners

Sat, 27 Apr 2002 12:17:33 -0400

I admit to not being a glass expert, but typically alkalis, such as ammonia and
lye, attack glass.  For that reason, in the chemical industry, alkali use in
glass lined reactors is verboten.

High sodium ion concentration is another contributor to glass etching.  When we
switched from untreated tap water to softened water, some, but not all, of our
glassware was attacked.  Obviously, some glass compositions are more susceptible
than others.

Acids, on the other hand, such as vinegar (5% acetic acid in water), usually do
not cause a problem - at least for most applications.   Strong acids of all
types (except hydrofluoric) are typically stored in glass in a chemical
laboratory.  Optical glasses may be another issue.

73, Joe

W2WU wrote:

> My optician thinks so. Vinegar = Acid = etches.
> Acetone, yes, it affects plastic & paint. Question was about glass
> Alcohol can affect paints. Ammonia?
>
> Bottom Line: What is the best OTC cleaner w/o residue?
> W2WU
> ---- Original Message -----
> From: Joe Giacobello, K2XX <[email protected]>
> To: <[email protected]>
> Cc: <[email protected]>; <[email protected]>
> Sent: 26 April, 2002 08:56
> Subject: Re: [Antennas] Glass Cleaners
>
> > Just out of curiosity, Rich, isn't Bon Ami too abrasive for optical glass?
> >
> > 73, Joe
> >
> > [email protected] wrote:
> >
> > > I do know that vinegar contains some solids and acetone can leave a film
> on
> > > the glass.  With over 20 years knowledge of cleaning optics for thin
> film
> > > coating, Bon Ami with a final alcohol (the purer the better) wipe is
> about as
> > > good as it gets.
> > >
> > > Rich, KF6SZA
> > >
> > > In a message dated 4/25/02 3:37:52 PM Pacific Daylight Time,
> > > [email protected] writes:
> > >
> > > <<what about using acetone or vinegar? -W2WU>>
> > > - - -
> > >
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