[ATM] Parabolization Progress on Mirror Face? Please Help?

["Jon Bales" <joncbales@yahoo.com>]

I just finished my 8" F5.7 just weeks ago and found the matching Ronchi test to be very useful.  During figuring, I never went 10 minutes straight, only a minute or so between cleaning and testing.  I found cold pressing, not warm pressing, adequate.  I overdid the warm pressing and shortened the life of my lap at least once during polishing.   I  Don't think warm pressing was necessary in my case. 
I kind of gave up on the Foucault tester I made, because I couldn't get consistent readings.  I printed off some Ronchi drawings to match, and felt more confident.  The mirror is out for coating now.  My star test using a glass Christmas tree ornament with the uncoated mirror, persuaded me to send it away to Florida for coating.  Can you find the image your mirror presents in the book by Texerau?  There are some illustrations in the second chapter on various surface anomalies.
_______________________________________________
ATM mailing list http://www.atmlist.net/