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Re: [PSUBS-MAILIST] is this ok

Frank, How did we do it before computers? By hand is how. Homemade ovens work, you just need to watch things, raise the temperatures slowly and lower them the same. It's all specified in the book, of course, but don't let modern tech blow you out of the water. As someone already said, it ain't rocket science, which is just as well in my case, I can assure you. Vance 


-----Original Message-----
From: Scott Waters <muddywatersfarm@hotmail.com>
To: personal_submersibles@psubs.org
Sent: Mon, 24 Mar 2008 3:11 pm
Subject: RE: [PSUBS-MAILIST] is this ok

not sure. I will ask.


 
From: ShellyDalg@aol.com
Date: Mon, 24 Mar 2008 12:22:04 -0400
Subject: Re: [PSUBS-MAILIST] is this ok
To: personal_submersibles@psubs.org

Hi Scott. Anneal is basically a heat treatment after cutting, grinding, polishing that relieves the stresses on the material. It also has a slight shrinking effect on the plexi. It's a process where the finished disk/dome is heated slowly to 325 degrees ( I think ) and held there, then cooled slowly ( many hours ) using a computer controlled oven. Not something an amateur can do easily, but is essential to produce a strong disk. Frank D.



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