Fw: ATM 46 grit?

["asm products" <asmprod@videotron.ca>]

Dear Chris

	It is a good idea to use the grit # 46, to dig the sagitta up to 75%. Then
use the grit # 80 up to 90% of the deph. Completed the curve deph at grit #
120 and you will be ready to do your first contact

Clear skies

Andre Taillon

----------
> From: John Scott McLean <jsmclean@gis.net>
> To: Chris Welsh <chris_welsh@sympatico.ca>
> Cc: ATM <atm@shore.net>
> Subject: Re: ATM 46 grit?
> Date: Friday, October 19, 2001 10:32 PM
> 
> 
> Hi Chris,
>   I would suggest that you write to Andre Taillon at ASM and ask for his
> advice. He has been very helpful to me with my BVC mirror and I'm sure he
would
> be glad to answer your questions also.
> John
> 
> Chris Welsh wrote:
> 
> > My grit sizes go: 46, 80, 120, 250, 500, 1000, 2500.
> >
> > Would splitting up the rough grinding into stages of half with 46 then
half
> > with 80 make a big difference?
> >
> > Chris
> >
> >  As such grit
> > > makes
> > > important fractures at the surface of the glass, I would use it only
in
> > the
> > > "chordal strokes" phase and stop its use a good millimeter before the
> > > target sagitta.
> > >  You might want to put grit in amounts more on the "bit few"
> > > side and collect the mud. You may then separate some finer grit to
take
> > > place
> > > of the missing 80 grit for a few wets. What is your next finer grit,
BTW?
> > >
> >
> > >
> > >
> > >
> 
> 
>