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Re: [ATM] Turntable and weight

To: Mike Lockwood <melockwo@uiuc.edu>
Subject: Re: [ATM] Turntable and weight
From: Mark Holm <mdholm@telerama.com>
Date: Wed, 28 Sep 2005 20:36:58 -0400
Cc: atm@atmlist.net
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Mike Lockwood wrote:

> The problem with leaving the mirror and lap in contact, either before 
> or after work, is that cerium reacts chemically with the glass, and 
> the lap pattern will imprint itself in the glass.  Admittedly, this is 
> only a real problem during figuring, and likely only with Cerium.  (I 
> don't like Rouge.)

I have seen etching, or something similar happen with zirconium
oxide also.  Didn't need to put it under Foucault test to see it.
The surface was visibly hazy.

Mark Holm
mdholm@telerama.com

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References:
- [ATM] Turntable and weight
  - From: "Jerry" <wa4guu@verizon.net>
- Re: [ATM] Turntable and weight
  - From: Mike Lockwood <melockwo@uiuc.edu>

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