Re: [ATM] Does glass retain moisture?

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

> But once equilibrated, that would still result in a paraboloid shape.
> I think we need to have regions of the mirror that have different
coefficients
> of thermal expansion, so that a paraboloid polished at one temperature
> would be a paraboloid at only that temperature, in fact would be a surface
> of revolution only at that temperature.  This should result in the
> surface exhibiting a sort of "dog biscuit"-like lumpiness at any other
> temperature, regardless of how well equilibrated.

Have never seen this once in hundreds of mirrors that I've tested.

 Mel Bartels

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