Re: ATM Grinding a 16 inch plate

[Anthony Stillman <atmer@flash.net>]

Steve Vegos wrote:

>Newport Glass has a chart on thier webpage with recommended quantites of
>grit for different mirror sizes.

http://www.newportglass.com/agrtkitg.htm

where I lifted the line:

"...starting with a standard plano / plano mirror blank when
using a machine generated tool"


I'm not sure what this means.  Perhaps others disagree, but I'de be hard
pressed to hog a 12.5" pyrex blank to f/5 with only 1.5 lbs of 80 grit.
The amounts seem a bit much for a generated blank and a bit shy for a flat
one.  Certaintly, 5 lbs is more than enough, but 1.5, I don't know, must I
hand my head in shame?  Have I been a grit glutton all these years?

Anthony