[Antennas] Re: OTC Glass Cleaners

2002年4月27日 11:04:21 -0700

It has been along time since I was in an inoganic chemical laboratory. But 
I do remember that the base glass bottle were more etced that the acid 
bottles. The sodium (strongest base ion) appears to like the Si in 
glass. Yes the hydrofluoric acid was not in glass, also, another 
hydrofluororsilisic (sp?) was not. That acid can leach lead!! The fumes 
can etch glass and eat teeth.
Weak ammonia solution, I believe is in Windex, is good. As well as vinegar 
water. I know of a window cleaner (female) who used one first then the 
other after to neutralize the surface.
One that I have wondered about is, a bag of pipe tobacco, slightly 
moistened to clean the inside of the windshield of your winter 
vehicle. Some people around here use it all the winter. I never have as I 
donot smoke. (Except for that tuning up on 160, one day.)
After softening water one must remove the soluble ions, Na+ 
especially, with filters and reverse osmosis. All the softening does is 
exchange ions for other ions. That kind of soften water is bad for people 
who are not allowed to take salt, NaCl, sodium chloride. I rather have my 
table salt sprinkled on the food rather than laced in my drinking water 
(coffee etc)
Just a few comments, and, I hoe that they are correct.
Chris opr Ve7HCB
At 12:17 PM 2002年04月27日 -0400, Joe Giacobello, K2XX wrote:
>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>>
> > > > - - -
> > > >
> > > > Your moderator for this list is:
> > > > Larry Wilson KE1HZ [email protected]
> > > > _______________________________________________
> > > > Antennas mailing list
> > > > [email protected]
> > > > http://mailman.qth.net/mailman/listinfo/antennas
> > >
> > > - - -
> > >
> > > Your moderator for this list is:
> > > Larry Wilson KE1HZ [email protected]
> > > _______________________________________________
> > > Antennas mailing list
> > > [email protected]
> > > http://mailman.qth.net/mailman/listinfo/antennas
>>- - -
>>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
>_______________________________________________
>Antennas mailing list
>[email protected]
>http://mailman.qth.net/mailman/listinfo/antennas