Re: [ATM] Richard's blanks...

["Vladimir Galogaza" <vladimir.galogaza@zg.htnet.hr>]

Bob,

>Remember that those blanks need special handling when applying
>the lap and make sure that you have a notice to the effect that
>you don't want to stress the glass with applied hot stuff as
>there isn't the strength to handle the heat stressing that a
>regular blank will take.


You are probably speaking about Richards
ribbed mirrors. If normal slumped blank
(that is without ribs) will be so sensitive to
temperature gradients that will surely mean that
it has lot of residual "frozen" stress in it.
Richard knows enough about annealing and is
checking his blanks. So it is very likely that
what you are talking about does not apply to
non ribbed slumped blanks.

Regards
Vladimir.



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