Re: [ATM] Support for slumped mirror

[Jerry Dove <jldove1@cableone.net>]

On Tue, 17 Jan 2006 13:08:04 -0800, you wrote:

>Three things you can do:
>
>(1) Wear rubber gloves, the heavy kind that dishwashers use, 
>
>(2) Attach a 3" diameter x 1" thick plywood knob to the center of the glass
>with pitch, and only touch the knob, not the glass.
>
>(3) Use bare hands, and only touch the glass near the center.  That worked
>for me when I corrected the astig on my 8" x 3/8" mirror.
>
>Keep in mind that none of this matters until you are on your last two grits
>(and throughout polishing, of course).  
>
>Also, a word about plop:  for this glass, because of the curved back, you
>must tell plop a big fat lie.  Tell plop that the sagitta is ZERO.  Plop
>will optimize the flotation for a flat disk of uniform thickness.  Well, at
>least you have uniform thickness, and it is "almost" flat...
>
>. . . Richard

	Richard, when you sent me the blank back, you drew a small diagram for a 3 point cell. Do you think that will be
alright or should I still run PLOP (which I don't know how to use anyway) for it?

	Thanks again,

		Jerry
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