Re: [ATM] Persistent turned-up-edge in mirror

[Bern Kosicki <kosicki@verizon.net>]

Mike,

Thanks for your advice.

At 01:41 PM 4/18/2007, Mike Lockwood wrote:

>One thing to keep an eye on is your polishing mixture.  If the
>mirror/tool are kept wet, there is less of a likelihood for the outer
>part

By "outer part", do you mean the largest radius of the mirror?  I usually 
start off with a fairly wet mixture of CeO and water, but have been running 
it to be fairly "dry" near the end of a wet, like Texerau 
recommends.  However, I don't let it get very  dry.  Motion gets pretty 
stiff at the end of a wet (which usually ends about 15-30 min after the 
last addition of CeO).

>to dry out.  This causes either cooling, in which case the glass
>shrinks away during polishing and then pops back up causing a possible
>TUE, or extra friction, in which case it can cause an edge roll.  You
>might be experiencing the former.

Thanks for your suggestion,

Bernie


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