Re: [ATM] Gugolz pitch

[John Lynch <john_lynch2006@yahoo.com>]

Bill,

I've used the aluminum oxide lapping powders
(25micron,
12micron, and 5 micron) with good success and also
think this is a good approach.

John Lynch

--- William Marriott <bmarriott@pacbell.net> wrote:

> Hello;
> 
> I have, over the years, found that the tried and
> true
> method of fine grinding with aluminium oxide lapping
> powders, which are specially shaped for their
> application, is the best way to go.  If you can do a
> nice 9u fine grind, or maybe 5u if your area is
> clean,
> the mirror will polish out just fine, with cerium
> oxide.
> 
> Both commercially and astronomically, I have not
> figured out why people use Zirconium oxide, but some
> people do seem to get positive results.
> 
> Bill Marriott
> VA Optical Labs
> 
> 
> 
> 
> 
> --- Mitch <funnybone101@earthlink.net> wrote:
> 
> > Is there an advantage to of Zirconium Oxide over
> > Aluminum Oxide?
> > for smaller sizes?
> > 
> > Isn't Aluminum oxide for grinding? Zirconiums is
> for
> > polishing, and slowly
> > at that.
> > 
> > Mitch
> > 
> > 
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> > 
> 
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> 



 
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