Re: [ATM] Turned edge - back to fine grinding?

["Mel Bartels" <mbartels@bbastrodesigns.com>]

> I am figuring an 8" F5 pyrex mirror, and I am afraid I have greated a very
> narrow (1/8 to 1/4") but severe turned edge on it. Tried several
techniques
> to get rid of the turned edge, but after a few hours at it it has not
>
> I am tempted to go back to fine grinding, probably 9 micron, for an hour
to
> get rid of the turned edge. And then repolishing. Can anybody recommend a

Well, chances are that if you do nothing different, you will once again end
up with that narrow turned edge.  Try polishing strokes that are pure back
and forth with absolutely no side swing with heavy pressure for a couple of
hours.  Also, trim your lap around the edge a bit.

Mel Bartels

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