Re: [ATM] slow polishiing

[Guy Brandenburg <gfbrandenburg@yahoo.com>]

Sometimes the Will-Bell pitch can be a little on the
soft side, especially if you are in a hot location.
One solution to that is to chip off all of the pitch,
put it, and whatever is leftover from when you poured
it, into a pot and actually let it all simmer and
bubble for 30 minutes or so. This drives off many of
the more volatile elements of the mixture, and makes
it harder. 

The person never did say whether the ronchigram was
inside or outside of COC, however.

Guy

--- Bob May <bobmay@nethere.com> wrote:

> Looks to me like a strong hyperbolic surface with ha
> high center.  This
> often happens with soft pitch from my experience. 
> The fun is going to be
> getting the surface to a sphere at the present and
> probably the best is to
> do MOT and put one hand in front of the other rather
> than side by side.  Do
> your strokes with no W and the mirror should
> eventually turn spherical.
> I'll note that if you are getting images that good,
> you probably are indeed
> polished out.
> Bob May
> http://nav.to/bobmay
> bobmay@nethere.com
> NEW! http://bobmay.astronomy.net
> 
> 
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> 


=====
Guy  Brandenburg
Washington, DC
My home page:
http://home.earthlink.net/~gfbranden/GFB_Home_Page.html
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