Re: [World] "Screen Burn", CC 550 and hazing - tin etch haze and sun haze.
I have used sodium hydroxide occasionally and never had any problem with
the glass hazing. I have had some good luck with CC550, but have also had
to replace some glass a couple times. Nothing serious, but still an
aggrivation. I avoid using CC550 now. My crews prfer to use 0000 steel
wool. It doesn't do as complete a job but there is less chance for damage
and there is no mess.
Bell window cleaning
On Fri, 20 Dec 2002 15:02:03 -0500 "Alex Goolsby" <firstname.lastname@example.org>
>Be careful, cc 550 can most unexpectedly etch/cloud windows. Dan
>explained phenomenon to me and I also found it mentioned in Winsol's
> "Before using any restoration chemical on glass always test.
>especially float glass, which has a microscopic film of tin on one
>to protect it from corrosion, if installed backwards, may be more
>damaged by corrosion than other panes of glass."
> Now I find the meaning of the above paragraph to be a bit unclear but
>upshot is that we run into these backwards installed windows more
>we would like. When you put cc 550 on them they cloud up with a
>bluish/whitish haze. This haze can be removed with a rotary drill and
>product from ABR but it isn't fun to have to do this. Doing a tiny
>first should be the best way to avoid this problem but the problem
>doing a small test area is that you cannot always see the cloud on
>small spot. (Maybe a loupe is the answer here? I have not tried one.)
>plan on using cc 550 I would recomend you arm yourself with a high
>high-speed drill and this 'acid etch remover' from ABR. (Thanks to
>Deines for telling me about ABR.)
>I have a question for those of you using sodium hydroxide: does it
>these "tin side out" windows? I doubt it but I'd like to know for
>We plan on switching to to SH to get away from this problem with the
>I too have seen this other hazing problem, mentiond by the Dallas W/C
>their post - the one you can encounter when using cc 550 in direct
>seems to give the glass an odd sheen that is only visible in direct
>you are looking at an angle. This seems to happen to the glass itself,
>the tin coating. Have others run into the same problem? Any
>From: Worldemail@example.com [mailto:Worldfirstname.lastname@example.org]On Behalf
>Sent: Friday, December 20, 2002 1:32 PM
>Subject: Re: [World] "Screen Burn"
>the best ive seen in removing screen rust is crystal clear 550. It
>great on the toughest stains but dont use it in direct sun light it
>burn the glass. Have used pumis and 0000 steel wool but the 550 is so
>faster and less time consuming.
> A Clear View Window Cleaning
> Dallas Texas
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