Re: [ATM] ATM Digest, Vol 36, Issue 27... Slicing a carrot made of glass..

["Russell Jocoy" <russjocoy@hotmail.com>]

>From: "Russell Jocoy" <russjocoy@hotmail.com>
>To: russjocoy@hotmail.com
>Subject: RE: ATM Digest, Vol 36, Issue 27
>Date: Sat, 23 Dec 2006 21:25:01 -0500
>
>
>
>
>>------------------------------
>>
>>Message: 4
>>Date: Fri, 22 Dec 2006 10:56:48 -0500
>>From: Don R Surles <Don.R.Surles-1@usa.dupont.com>
>>Subject: Re: [ATM] Cutting Porthole in half
>>To: mikell@optonline.net
>>Cc: atm@atmlist.net, "Thomas A. Moulton" <tom@moulton.us>,
>>	atm-bounces@atmlist.net
>>Message-ID:
>>	<OFB9678EC2.695548C0-ON8525724C.00564B5C-8525724C.0057C55E@CDCLN05.LVS.DUPONT.COM>
>>
>>Content-Type: text/plain; charset="us-ascii"
>>
>>my $.02 worth...if I was going to invest my time and $$$ in making a
>>mirror I would start with the best blank possible, say a well-annealed
>>pyrex blank that is blanchard ground flat on the back and  beveled on the
>>edges.  this may cost a few dollars more but i can tell you from
>>experience that having put time and money into a plate glass mirror or one
>>of pyrex that has a chip in the back or front certainly reduces the level
>>of pride in the finished product.
>>
>>i would also forgo the pleasures of hogging out a blank as well as the
>>pleasures of making plaster of paris tools with tiles.  for our
>>Mid-Atlantic Mirror Making weekends we use pre-generated curve pyrex
>>blanks and full size plate glass tools with the opposite curve.  we start
>>with 220 grit and concentrate on producing a scratch/sleek free
>>well-corrected parabolic surface.  if someone wants the pleasures of
>>hogging and tool making then do it on the side with a practice mirror.
>>
>>start your mirror making experience with the materials that offer the most
>>probablity of success...there are multitudes of opportunities for less
>>than desireable results but quality of materials can be eliminated as a
>>factor before you begin.
>>
>
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   Don,
     All of your statements make complete sense, If you have the funds to 
undertake them. Some  ATMer's have a hard time buying a blank and the grit 
to grind. We all don't start out with the "cash" to achieve your basic 
standard of the ideal beggining of the mirror making process.
      I take heed to say that you need not start with a "well annealed Pyrex 
blank".. I own three
"Plate glass" mirrors (and thin to-boot) that perform very well thank you.  
Plate glass is softer than Pyrex and is a great medium for a rookie to test 
his skill.. And the cost is less. As far as a solid tool, you can argue with 
the rest of the list.. A tile tool is the ATM standard now and to use a 
glass tool is a waiste of good glass..... That's my .02 cents     Russ Jocoy
    PS...  I have a large chip in my "plate glass" mirror and the Orion 
Nebula can"t tell the diference
when it sends it's photon's my way.... It really doesn't bother me 
either....
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