To: "Richard Schwartz"
,,
 "Peter" ,
From: Dennis Rech 
Reply-To: Dennis Rech 


At 12:19 PM 12/22/02 -0800, Richard Schwartz wrote:

>I used an 8" Schmidling tool.   Although it took a while to get good contact
>all over the tool, I will say that it is the next best thing to high speed
>diamond machining.   I have reason to believe that for fine grinding, one
>wet per grit is enough.
>
>I don't agree with some of Jack's politics, but his grinding tools are the
>VERY BEST, way better than the tile in dental stone tools that I have been
>advocating.
>
>So, this gets me thinking...   Why not embed chunks of aluminum in dental
>stone to make a conforming curved tool?  Will the dental stone securely bond
>to the metal?   Will the metal wear away to give good contact with the
>glass?   Will the grinding quality be good?
>
>I guess I will put that on the list of future experiments.
>
>. . . Richard

Hi Richard,
You could also use that dental stone to make a mold of the mirror curve and
just cast the aluminum blank. That's what we do up here. If you do a pretty
good job of mold making, you do not even need to machine the tool. The face
will wear into the mirror curve quickly.

Dennis

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