[ATM] A new Challange

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

   To All,
                 The idea of of low cost blank is right down my alley..  
Let's get real, The main
ingredient for a surface to reflect light is GLASS.. whether it be low 
expansion, no expansion,
or high expansion.  Ceramic breeds are also options. Just remember the more 
exotic the material
the higher the cost.
        I am willing to sell 24" and 30" disk's of plate glass for rock 
bottom prices... BUT....they
are only 3/4 inches thick.. Knock yourself out, no glues, no resin, no 
lamination will cure this
glass monster to make it thicker. You can fuse, but you will add cost to 
anneal it back to where
it was.  You want a 24" or a 30" mirror for low cost? Design a support to 
grind, and polish this
thin glass through it's process and then a mirror support that will give it 
the least stress as possible.
The thick glass will not get any cheaper..
     As Mel Bartels also said the primary mirror is only the beggining.. the 
larger the mirror the more
all the other support materials will cost, and if you don't know the rest,  
grind a nice 8 or 10....
             24" and  30" by 3/4" plate glass mirrors should only be 
attempted by the insane..
please make me eat my words..any of you crazy glass digger's...
                                           Russ Jocoy
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