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Plate Glass Thickness

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Posted by Ivan Trpeski on May 9, 2002 22:01:01 UTC


I wonat to make newtonian scope, with primery mirror grinded from Plate glass. Beacause im from europe , from Macedonia to be exact, its very hard for me to obtain a pyrex blank. So i decidet to make a 8" mirror from Plate glass. There is two things that im not decided yet so i need helt.
The fist thing is the thicknes of the blank. Is 15mm (3/5") ok for 8" mirror?
And second, can i use grinding povder obtined from grinding-paper for metal grinding.

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