Re: [ATM] Fine Grind already Blanchard ground mirror blank back?

["Jerry" <wa4guu@verizon.net>]

Wow!  I think this subsurface damage thing has been taken too far.  It used
to be that 5 or 6 grades of grit would get a raw piece of glass ready for
polish. Now it takes from 9 to 12 grades to get there and we need to do the
back too! To a full polish!!

It used to be the argument was about whether cerium oxide, red rouge, or
black rouge makes a better surface. Now it is that plus a zillion different
brands of cerium or better yet, if it is radioactive maybe that must be the
thing to use.

And finally the "acid dip"!!

It's like the diet book craze. What could be next???

Enough already! There are a fine number of things to do when making optics.
We don't really need to be chasing "Boogie Men".

Jerry



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