Re: [ATM] Mirror silvering

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

It's now printed by that company that reprints technical books... the one that features weird, steam-driven machines and all... can't recall the name at this point. And I can't find it on my bookshelf, either. But I agree that it's a useful book, illustrated by the late, great Roger Hayward.

Jarvis Krumbein <jkoptic@juno.com> wrote: John Strong in "Procedures in Experimental Physics" describes a method of
"Lacquering" a mirror using collodion dissolved in ether to protect a
silver coating from tarnishing.  I haven't tried this method but it
should work.  "Procedures in Experimental Physics"  is a gold mine of
useful info.  I don't  know if it's still in publication ( 1st
Prentiss-Hall edition published in 1938, my copy is the 17th printing in
August 1952) but if you can find a copy, grab it.

Jarvis Krumbein

On Mon, 21 Jan 2008 12:11:22 -0500 waldo kitty 
writes:
> Ian McKernan wrote:
> > Got interested in this a while ago and have the stuff required 
> but
> > haven't gotten around to it yet.  Read that a silver coating can 
> be
> > preserved by covering the mirror when not in use, and having an 
> air
> > space under the cover. Inside the air space put Lead Acetate. It
> > scavenges the sulphides that tarnish the silver so it only 
> tarnishes /
> > corrodes when the telescopes actually in use.
> > 
> > I think it is possible to get lead acetate impregnated tape that 
> is used
> > in some kind of industrial monitoring gear.
> 
> i don't recall what it was that i read but this is similar to what i 
> alluded to 
> in my response in this thread a few days back... for some reason, 
> i've been 
> thinking of alum infused cloth but i haven't taken the time to try 
> to confirm 
> that alum is what i was thinking of...
> 
> in any case, most real silver silverware sets have some kind of 
> cloth with them 
> that you keep the silverware wrapped in so as to prevent tranishing 
> (aka 
> corroding)...
> 
> the answer sought to the question asked is what is this cloth 
> treated with... 
> find that out and you'll have the answer to slowing the tarnishing 
> of a silvered 
> mirror ;)
> 
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Guy Brandenburg, Washington, DC
My home page on astronomy, mathematics, education:
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or else 
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