Re: [ATM] Mirror question

[Jarvis Krumbein <jkoptic@juno.com>]

Did you have your mirror coated by Clausing?  The fist mirror I made 60
years ago came back from Clausing with the same note and I've talked to
many ATMs who have had the same experience.  If the incomplete polish
appears uniformly near the edge, say up to an inch wide try the mirror
first by masking the incompletely polished part.  Do this just to get an
idea as to how your first mirror works on a star.  Even incompletely
polished, it should produce good images.  When you are satisfied that all
is well except for the polish, go ahead and finish the polishing as
suggested by others on the list.

Jarvis Krumbein

On Sat, 16 Jun 2007 18:53:37 -0500 "John" <jgreenan2@sbcglobal.net>
writes:
> 
> Hello All,
> 
> I bought an 8" mirror grinding kit awhile back. I read up on 
> techniques
> for grinding and I figured I would take a chance. I ground it down 
> and
> polished it to a point I "thought" was good, I sent it off for 
> coating
> and it came back coated but they also put a note in the box saying 
> the
> mirror was not polished completely.
> 
> So, being new at this, what is my next step? Do I re-polish it with 
> the
> coating on? or, do you somehow remove the coating, then polish. 
> Then,
> the most important question of all, how do I know when it's 
> polished
> completely?
> 
> Thanks in advance   
> 
> John
> 
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> 
> 
 
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