Re: [ATM] RE:anealing

["David Harbour" <scarab2@cox.net>]

Thanks, Guy, 

I was a little embarassed. 

Dave


----- Original Message ----- 
From: "Guy Brandenburg" <gfbrandenburg@yahoo.com>
To: "Mel Bartels" <mbartels@bbastrodesigns.com>; <atm@atmlist.net>
Sent: Saturday, May 21, 2005 6:20 PM
Subject: Re: [ATM] RE:anealing


> Willmann-Bell doesn't make their glass. They buy it
> from United Lens in New England.
> 
> --- Mel Bartels <mbartels@bbastrodesigns.com> wrote:
> > > As far as I know the only sources for Pyrex blanks
> > for ATMs are Newport
> > > Glass and Wilhelm-Bell. The latter more expensive
> > than the former but a
> > > little more reliable. Both claim that they anneal
> > the glass but there is
> > > plenty of evidence to the contrary.
> > 
> > 
> > The problem, seems to me, is more in the translation
> > or adaptation of 
> > 'anneal' to 'sufficiently strain free'.  There is
> > not a strict coupling 
> > between the two.  That is, a blank can be well
> > annealed, yet have 
> > objectionable strain.  Also, you need to watch the
> > qualification of 
> > 'annealed'.  Most QA testing is done with a small
> > patch at the surface of 
> > the glass.
> > 
> > Mel Bartels 
> > 
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> > 
> 
> Guy  Brandenburg
> Washington, DC
> My home page:
> http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
> 

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