Re: ATM 10" Flex Mirror

["Dennis Nikitin" <ndenis@sarkor.com>]

> I have a Dan Cassaro 10" plate glass mirror polished out to a good
> sphere, ready to be coated and flexed.  However, I am now having second
> thoughts.  There are a couple of pretty large scratches on the back,
> which is how the blank came from Dan.  I didn't think much about them,
> but now I am concerned that one or more of them will develop into
> fractures when subjected to 130lbs of flexing force.

Take a piece of window glass and make some large scratches, then subject the
piece to some flexing force. Will the scratches turn into fractures? I don't
think so. They would if you knock the piece by a hummer but only if the
scratches are really deep and long. Anyway try it with any piece of glass.

>Should I bag the flexing and
> parabolize?  Thanks.

PARABOLIZE IT DENNIS!!!! You will get a lot of fun.


Dennis Nikitin