RE: 1/3 stroke turns to be 2/3 stroke (was RE: ATM Pressure during po lishing??)

[Bob Prabowo <BOB@bahana.co.id>]

Hi Ken,

> Hard to believe the lines are straight!  How many lines are you
> looking at
> on the face of the mirror?  Are they still straight at 5 or 6 lines
> across
      the face?
Gee, I don't remember how many lines I saw on the mirror, but they are
straight.

I have another question, after washing the mirror before you put it on
the test stand do you wipe the surface of the mirror, or do you just let
the mirror dry?
I let the mirror dry (I put it on its edge), but when I look at it
through the tester I can see spots or stains. Do you wipe the mirror to
remove these stains/spots? 

Hmmm, I'm thinking about going back to fine grinding, I think I have a
good reason to do it (it's a self excuse actually :-)) , the focal
length is shorter than I plan. 

Bob P. Sumitro
Jakarta, Indonesia

visit my still-under-construction astronomy and telescope making page:
http://www.geocities.com/CapeCanaveral/Hall/2670/