<div>Hi Brian,</div>
<div> </div>
<div>Stanley Plastics charged me £120 (about $200) per 8" viewport made to PVHO. I didnt think that was too bad for peace of mind.</div>
<div>Kind Regards</div>
<div>James<br><br></div>
<div class="gmail_quote">On 1 April 2014 17:01, Brian Cox <span dir="ltr"><<a href="mailto:brian@ojaivalleybeefarm.com" target="_blank">brian@ojaivalleybeefarm.com</a>></span> wrote:<br>
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<div>Hi Doug,</div>
<div> I think I'm going to see what finished windows would cost me from Hydrospace. The chamber for the annealing would need to be completely re-thought out. I was thinking that maybe an enclosed liquid, like antifreeze, could be used to circulate through a special chamber that would be surrounded with the liquid. That way you could really get a handle on the exact temperature of a circulating liquid. But still you have to change the temp, maybe a mixing valve. But by the time I got through with that I could probably buy a number of viewports !</div>
<div> </div>
<div>Attached is a shot of the stresses I induced with my bad annealing attempt </div><span class="HOEnZb"><font color="#888888">
<div> </div>
<div>Brian<br><br><br><br><br><br><br><br><br></div></font></span>
<div>
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<div dir="ltr">My sympathies Brian. I'm sorry that your experimental annealing didn't go well, but as they say, it is always better to try and fail than fail to try. It sounds like perhaps you just need to make some modifications to your oven to better regulate temperatures, but I'm sure that is easier said than done. Are you planning to make another attempt? ~ Douglas S. </div>
<div><br><br>
<div>On Tue, Apr 1, 2014 at 10:49 AM, Brian Cox <span dir="ltr"><<a href="mailto:brian@ojaivalleybeefarm.com" target="_blank">brian@ojaivalleybeefarm.com</a>></span> wrote:<br>
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<div>Epic Fail ! my attempt to anneal a viewport did not go well. The temps swings were so great that it was impossible to regulate. The mass in the oven that I had hoped would moderate the swings made it so the lag time between the heating cycle and when the thermometer sensor saw the temperature change uncontrollable. And the heat was not even though out the oven as well.</div>
<div> </div>
<div>Brian<br><br>--- <a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a> wrote:<br><br>From: hank pronk <<a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] annealing acrylic<br>Date: Tue, 25 Mar 2014 05:35:51 -0700 (PDT)<br>
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<div><span>Brian,</span></div>
<div><span>I say when in doubt, test. If your not building a test chamber , you can make your sample window to fit my chamber and I will test it for you.</span></div>
<div><span>Hank</span></div>
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<div dir="ltr"><font face="Arial">On Monday, March 24, 2014 7:23:18 PM, Brian Cox <<a href="mailto:brian@ojaivalleybeefarm.com" target="_blank">brian@ojaivalleybeefarm.com</a>> wrote:<br></font></div>
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<div>
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<div>Hank,</div>
<div> I have the book, that's where the annealing schedules are, they vary quite a bit, there is an absolute minimum time and then there is the original recommended time. The recommended time comes out to be around 51 hours where as the shortened time is maybe half that. I'm just doing one test piece to start off with. I was also using the same oven ( a toaster oven I got from Sears for $75 bucks) to heat the welding rod to 250 degrees F before we used the rod ( it had been sitting out for a few days). I was able to keep the temperature fairly even for the welding rod at 250. </div>
<div> </div>
<div>Brian <br><br>--- <a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a> wrote:<br><br>From: hank pronk <<a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] annealing acrylic<br>Date: Mon, 24 Mar 2014 17:39:27 -0700 (PDT)<br>
<br></div>
<div>
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<div><span>Brian,</span></div>
<div><span>Do you have the Stachiw book of Acrylics, I can send you mine if you don't have a copy. There is some pretty important stuff in there.</span></div>
<div><span>Hank</span></div>
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<div dir="ltr"><font face="Arial">On , hank pronk <<a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a>> wrote:<br></font></div>
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<div>
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<div><span>Brian,</span></div>
<div><span>How thick is your acrylic? should take more than a night?</span></div>
<div><span>Hank</span></div>
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<div dir="ltr"><font face="Arial">On Monday, March 24, 2014 6:33:09 PM, Brian Cox <<a href="mailto:brian@ojaivalleybeefarm.com" target="_blank">brian@ojaivalleybeefarm.com</a>> wrote:<br></font></div>
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<div>
<div>
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<div>Yes, I have the annealing schedules. I have an electric oven and two digital thermometers, one I'm going to put in a piece of acrylic and the other one I'm going to use to monitor the oven temperature itself . I'm worried that the thermometer in the acrylic won't register until it gets heated throughout, and so then the oven temp might go higher than it should. So between the two readouts I can heat it gradually up. It'll be a long night.</div>
<div> </div>
<div>Brian<br><br>--- <a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a> wrote:<br><br>From: hank pronk <<a href="mailto:hanker_20032000@yahoo.ca" target="_blank">hanker_20032000@yahoo.ca</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] annealing acrylic<br>Date: Mon, 24 Mar 2014 17:22:32 -0700 (PDT)<br>
<br></div>
<div>
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<div><span>Brian,</span></div>
<div><span>Are you going to anneal your windows yourself? </span></div>
<div><span>Hank </span></div>
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<div dir="ltr"><font face="Arial">On Monday, March 24, 2014 6:03:10 PM, Brian Cox <<a href="mailto:brian@ojaivalleybeefarm.com" target="_blank">brian@ojaivalleybeefarm.com</a>> wrote:<br></font></div>
<div>
<div>
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<div>Used my polarized lenses on the newly cut piece and it appears clouded throughout the whole piece. Where as another piece I have, you can clearly see a stress area around where it has been drilled. </div>
<div> </div>
<div>Brian</div>
<div> </div>
<div><br>--- <a href="mailto:emile@airesearch.nl" target="_blank">emile@airesearch.nl</a> wrote:<br><br>From: "Emile van Essen" <<a href="mailto:emile@airesearch.nl" target="_blank">emile@airesearch.nl</a>><br>
To: "'Personal Submersibles General Discussion'" <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>Subject: Re: [PSUBS-MAILIST] annealing acrylic<br>
Date: Mon, 24 Mar 2014 22:40:46 +0100<br><br></div>
<div>
<div><font color="navy" face="Arial"><span style="FONT-FAMILY:Arial;COLOR:navy;FONT-SIZE:10pt" lang="EN-GB">As far as I know it is only cast.</span></font></div></div>
<div><font color="navy" face="Arial"><span style="FONT-FAMILY:Arial;COLOR:navy;FONT-SIZE:10pt" lang="EN-GB"></span></font> </div></div>
<div><font color="navy" face="Arial"><span style="FONT-FAMILY:Arial;COLOR:navy;FONT-SIZE:10pt" lang="EN-GB">Regards, Emile</span></font> </div>
<div><font color="navy" face="Arial"><span style="FONT-FAMILY:Arial;COLOR:navy;FONT-SIZE:10pt" lang="EN-GB"></span></font>
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<div><b><font face="Tahoma"><span style="FONT-FAMILY:Tahoma;FONT-SIZE:10pt;FONT-WEIGHT:bold">Van:</span></font></b><font face="Tahoma"><span style="FONT-FAMILY:Tahoma;FONT-SIZE:10pt"> Personal_Submersibles [mailto:<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank">personal_submersibles-bounces@psubs.org</a>] <b><span style="FONT-WEIGHT:bold">Namens </span></b>Brian Cox<br>
<b><span style="FONT-WEIGHT:bold">Verzonden:</span></b> maandag 24 maart 2014 20:37<br><b><span style="FONT-WEIGHT:bold">Aan:</span></b> PSubs <br><b><span style="FONT-WEIGHT:bold">Onderwerp:</span></b> [PSUBS-MAILIST] annealing acrylic</span></font>
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<div><font face="Arial"><span style="FONT-FAMILY:Arial;FONT-SIZE:10pt">I'm planning on annealing my viewports, does anyone know if the acrylic from the factory is pre-shrunk ?</span></font>
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<div><font face="Arial"><span style="FONT-FAMILY:Arial;FONT-SIZE:10pt">Brian</span></font> _______________________________________________ Personal_Submersibles mailing list <a>Personal_Submersibles@psubs.org</a> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a> </div>
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