To: "ATM" 
Reply-To: "Scott Berfield" 


Finally made it all the way through 9 Micron on my 12+" BVC blank with
no scratches or other visible flaws. WOOT!

The surface has an amazingly smooth satin texture - very neat - and
reflects strongly when looked at from a shallow angle.

The 15 and 9 went very quickly. I ended up doing a number of extra wets of
9 micron and let them work longer than normal to try to break down the grit
more finely. No sticking, though the two pieces are clearly VERY closely
mated in shape with good contact and if I shifted things incorrectly there
was a definite boost in the adhesion of the two discs. I examined the
entire surface with an eyepiece with the barrel removed since my jeweler's
loupe was no longer strong enough to really show any detail and found no
pits or scratches.

My f-ratio seems to be right around 4.55 or so - close enough for garage
work I think.

Tonight I pour the pitch lap and I aim to be able to do a preliminary
Ronchi test this weekend to test for the sphere. Wish me luck. \

-sb



-----------------------------------
They always say that time changes things, but you actually have to change
them yourself.

-Andy Warhol

--- BBBS/NT v4.00 MP