Re: [ATM] Silicone Failure

["David Harbour" <scarab2@cox.net>]

Gilbert, all:

Ritchey would have laughed at the silicone trick, I believe. Go back to
first principles (absolutely no offense intended: there is a principle in
craftsmanship: "shortcuts" degrade the end product). Silicone is a shortcut
for mounting mirrors; but it is SUPERB for making polishing lap molds.

Dave


----- Original Message ----- 
From: "Gilbert Gagne" <gil5941@earthlink.net>
To: <atm@atmlist.net>
Sent: Thursday, May 26, 2005 9:06 AM
Subject: RE: [ATM] Silicone Failure


> Jay Kirkland wrote:
>  >...Siliconed the mirror onto its cell about two weeks ago and let it
> cure.... As soon as the mirror neared verical, the top 18 support
>  >points sheared away from the metal. ... But what did I do wrong? Wrong
> silicone?
>
> I would suspect oily contamination of the metal parts. Next time, try
> using a good degreaser like trisodium phosphate (TSP), available from
> Home Depot/Lowe's.
> Gil Gagne
> Port Orange, FL
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>


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