Re: [ATM] microgrit (was: Gugolz pitch)

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

This looks the same to me.
http://www.salemdist.com/Telescope.html

You probably went to
http://www.salemdist.com/precision/catalogue.asp

Jerry

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
William Marriott
Sent: Tuesday, December 12, 2006 7:01 PM
To: atm@atmlist.net
Subject: Re: [ATM] microgrit (was: Gugolz pitch)

I was just looking at Salem's website, and it looks
like there have been some major changes in the
company, but I suspect all the traditional materials
are still available, but it might be easier to contact
their west coast office at Salem/Patterson
distributing.
(562)944-6155

However, minimum quatities may make it difficult, one
might try National Abrasives in San Leandro CA, we buy
a KC abrasives untreated lapping compounds, and have
used them with great success for 20+ years.

Bill Marriott
VA Optical Labs






--- David Adams <elrey314159265359@yahoo.com> wrote:

> 
> I am looking for a source for 30u, 15u, and 9u
> "specially shaped"
> aluminum oxide powders, but the Salem site does not
> indicate they
> carry these anymore?  Do you just have to call and
> ask?  Or do I 
> need to go to another source?
> 
> I also noted that the SSI ebay store charges 3x for
> shipping 
> what they charge for product.
> 
> David
> 
> --- 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/
> > > 
> > 
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
> > 
> 
> 
> 
>  
>
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