Re: [ATM] Coating not Adhering on Glass

["Peter" <peter@kitgear.com>]

Hi Vladimir,

Thanks for your input.

We used Calcium Carbonate for the cleaning and I fear that some residue may
have remained. Do you think the mirror is Ok to use or redo the coating?

Thanks,

Peter

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf Of
Vladimir Galogaza
Sent: June 30, 2006 1:07 PM
To: ATM List
Subject: Re: [ATM] Coating not Adhering on Glass


> I use Kleenex with acetone and methyl alcohol for final wipe.

Wiping a glass for cleaning purpose is generally not a good idea.
There is inherent risk of scratches by occasional dust of abrasive matter.
Final "wipe" with volatiles like acetone or alcohols (methanol is
poisonous by the way), is very inefficient because after wipe, thin layer
of solvent remains and evaporates quickly leaving dissolved stuff on the
glass.
Best final wash is water, distilled or deionized, poured on the inclined
glass.
Clean glass will let water run off and few remaining droplets should be
blown
away. No wiping necessary if glass was clean. If water sticks, this is sign
of insufficient cleaning.
First cleaning is best done underwater with little of  neutral detergent and
light touch
of cotton previously inspected for presence of foreign hard inclusions( eg,
wood).
Breath test mentioned by Peter is efficient and simple way of detecting
unclean areas.


Regards
Vladimir.




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