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[ATM] mirror damage

To: <atm@atmlist.net>
Subject: [ATM] mirror damage
From: "Cec & Cris" <ccabar@bigpond.com>
Date: Mon, 6 Jun 2005 21:15:09 +1000
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Hi guys

I need some advise. I have come across a problem grinding my pyrex 250mm mirror. I was grinding with the 240 grit (mirror on top) when a chip came off the side (edge). It only slightly affected the circular shape < 1 mm. The problem is that it is a rather large chip and it has not left much thickness at the top edge about 1mm. Can someone advise me on what I should do? I was thinking of filling it  up with fibreglass filler (builders bog) to strengthen the edge a bit so that I can continue grinding. Can I do this or will this have an affect on the illuminisation? Will it come off or melt? Is the illuminisation done with heat or not? Can someone please advise.

Regards Cristian
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Follow-Ups:
- Re: [ATM] mirror damage
  - From: "Bob May" <bobmay@nethere.com>
- Re: [ATM] mirror damage
  - From: Guy Brandenburg <gfbrandenburg@yahoo.com>
- Re: [ATM] mirror damage
  - From: "James Lerch" <jlerch1@tampabay.rr.com>

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