From: "CSC" 
To: "Atm" 
Reply-To: "CSC" 


See Texereau's photos using a Lyot technique that shows the roughness of
most techniques.  The rouge on pitch is the finest. I use Everflo, an
additive for precision optics that claims to reduce roughness.

I doubt you would notice much image difference if you finished with cerium,
but I do my final figuring with the smoothest and slowest agent I can find,
and the surfaces are velvet smooth.  Cerium cuts too fast for me.

Colin

-----Original Message-----
From: owner-atm{at}shore.net [mailto:owner-atm{at}shore.net]On Behalf Of Mike
and Sara
Sent: Tuesday, March 18, 2003 9:46 PM To: atm{at}shore.net
Subject: ATM Red Rouge



Hello!

    I've read a few posts on the use of red rouge after cerium oxide.  How
significant is the difference between surfaces polished with cerium oxide
and red rouge?  In other words, is the effect noticeable so that I should
finish my mirror wiht a period of figuring with red rouge?  I'm making a
Dall-Kirkham, especially for planetary viewing, but if red rouge won't
improve the performance of the scope over what cerium oxide would provide,
I'd prefer to skip it.  Thanks and best regards.

Mike

--- BBBS/NT v4.00 MP