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looking for a suggestion on small chamber
I have several A/C compressor housings out back and it occurred to me that if I could cut them in half a make a good seal they would make a good chamber. Does anyone have any suggestions on how to make a sealing surface after I cut them in half at the equator?
Russell |
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Re: haze on mirrors?
Paul Anderson
¿ªÔÆÌåÓýWell, I spent a little bit of time in a physics lab where they working with high vacuum. The technique they used most often was while wearing rubber gloves, rinse with acetone and wipe off with kimwipes.? On 2012-10-04, at 2:59 PM, Guy Brandenburg <gfbrandenburg@...> wrote:
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Re: haze on mirrors?
Judging by recommendations and videos I've seen, there are lots and lots of different ways of cleaning mirrors before coating!? ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ From: Kirk Wallace To: VacuumX@... Sent: Sunday, October 7, 2012 8:08 PM Subject: Re: [VacuumX] haze on mirrors?
?
On Fri, 2012-10-05 at 10:26 -0700, Thomas Janstrom wrote:
> > I know this going to sound silly, but you are using distilled water > right? If so then that just leave the paper and possibly anything that > might get transferred from your gloved hands to those towels. I am very new to this vacuum thing, but I would guess that blowing water off a mirror would be a good way to finish the cleaning process, but apparently is not recommended. I've also been known to wash dirty optical disks with a drop of soap and running water, then rinse, blow the bulk of the water off by mouth, then spin the rest off in an old CD drive. My thinking has been that touching the surface is not good, even with soft paper, so I've looked at using streams of water and air to get the job done. I also wonder if an ultrasonic cleaner might be useful? Looks like these guys finish with alcohol and dry with paper towels of some sort: http://mthamilton.ucolick.org/public/tele_inst/2006Aluminizing/eg/ -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA |
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Re: haze on mirrors?
On Fri, 2012-10-05 at 10:26 -0700, Thomas Janstrom wrote:
I am very new to this vacuum thing, but I would guess that blowing water off a mirror would be a good way to finish the cleaning process, but apparently is not recommended. I've also been known to wash dirty optical disks with a drop of soap and running water, then rinse, blow the bulk of the water off by mouth, then spin the rest off in an old CD drive. My thinking has been that touching the surface is not good, even with soft paper, so I've looked at using streams of water and air to get the job done. I also wonder if an ultrasonic cleaner might be useful? Looks like these guys finish with alcohol and dry with paper towels of some sort: -- Kirk Wallace California, USA |
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Re: haze on mirrors?
¿ªÔÆÌåÓýIf they have changed the treatment of
the municipal water supply then a new chemical may be being
deposited on the glass prior to coating leading to the haze.
Option two (more remote) is that you have something contaminating
you chamber, that can be very hard to track down though. Try using
distilled water for the final rinse for a few mirrors (the cheap
stuff for irons at the supermarket will work) and see if that
helps?
Thomas. On 4/10/2012 6:07 PM, Guy Brandenburg wrote: ? |
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Re: haze on mirrors?
¿ªÔÆÌåÓýI know this going to sound silly, but
you are using distilled water right? If so then that just leave
the paper and possibly anything that might get transferred from
your gloved hands to those towels.
Cheers, Thomas. On 4/10/2012 11:59 AM, Guy Brandenburg wrote: ? |
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Re: haze on mirrors?
Not diffiusion oil. I'll try to take some images. ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ From: Andrew Aurigema To: VacuumX@... Sent: Friday, October 5, 2012 7:25 AM Subject: Re: [VacuumX] haze on mirrors?
?
can you image it in any way ????????? maybe with a little puff of breath to make a bit of surface condensation so we can see it ??? The only time i ever see fog on the mirror after stripping is from something that went wrong in the aluminizing process.? something like diff pump oil vapor getting into the chamber during the aluminizing process and sticking to the glass as a kind of soot.? Drew in soggy FLA ------------------------------------------------------------ On Fri, Oct 5, 2012 at 2:18 PM, Thomas Janstrom <t_janstrom@...> wrote:
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Re: haze on mirrors?
can you image it in any way ????????? maybe with a little puff of breath to make a bit of surface condensation so we can see it ???
toggle quoted message
Show quoted text
The only time i ever see fog on the mirror after stripping is from something that went wrong in the aluminizing process.? something like diff pump oil vapor getting into the chamber during the aluminizing process and sticking to the glass as a kind of soot.? Drew in soggy FLA ------------------------------------------------------------ On Fri, Oct 5, 2012 at 2:18 PM, Thomas Janstrom <t_janstrom@...> wrote:
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Re: haze on mirrors?
No, I don't. Never have, except for polishing & figuring. This phenomenon is recent. Not quite sure what you are trying to say. ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ From: Thomas Janstrom To: VacuumX@... Sent: Friday, October 5, 2012 1:26 PM Subject: Re: [VacuumX] haze on mirrors?
?
I know this going to sound silly, but
you are using distilled water right? If so then that just leave
the paper and possibly anything that might get transferred from
your gloved hands to those towels.
Cheers, Thomas. On 4/10/2012 11:59 AM, Guy Brandenburg wrote: ? |
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haze on mirrors?
Every so often, I am recently finding that a haze remains on mirrors that I have cleaned and aluminized, even ones that I have stripped. I am wondering if it might be from the composition of the paper towels I use for the final drying... Any thoughts? ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ |
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Re: New washing detergent for mirrors prior to aluminizing
Some people do use nitric acid, but I think it's too scary, and not necessary either. Yes, some places, like Mount Wilson, do use chalk aka calcium carbonate to help with the cleaning. When I switched to alconox, I found the CaCO3 no longer necessary at all. ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ From: Charles Rydel To: "VacuumX@..." Sent: Saturday, September 15, 2012 8:22 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
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Calcium carbonate is chalk. Pure alcool can help too. What I want is to obviate the use of nitric acide. ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg <gfbrandenburg@...> To: "VacuumX@..." Cc: "VacuumX@..." Sent: Sunday, September 16, 2012 1:17 AM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
You need to make sure it's very very very clean before putting it in the bell jar. There are lots of methods used by different people. Some use a slurry of pure calcium carbonate precipitate with water. I examine how the water flows off the mirror. If I see raindrops like on a window then it's dirty. If the water flows off like a sheet with no holes then it's clean. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
Charles Rydel
Calcium carbonate is chalk. Pure alcool can help too. What I want is to obviate the use of nitric acide. ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Cc: "VacuumX@..." Sent: Sunday, September 16, 2012 1:17 AM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
You need to make sure it's very very very clean before putting it in the bell jar. There are lots of methods used by different people. Some use a slurry of pure calcium carbonate precipitate with water. I examine how the water flows off the mirror. If I see raindrops like on a window then it's dirty. If the water flows off like a sheet with no holes then it's clean. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
Charles Rydel
around 30$ I presume. You can buy it trough astrosurf or Amazon.fr (not US !) ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Sent: Sunday, September 16, 2012 1:19 AM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
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Great! Not too many Americans will be able to read them, however. I wonder how much it will cost to order them and have them shipped to the USA. Formidable! (en francais - en anglais ca ne veut rien dire!) ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ From: Charles Rydel To: "VacuumX@..." Sent: Saturday, September 15, 2012 4:26 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
Hi again, At the end the book is out, have a look here :?http://www.astrosurf.com/telastrograf/ ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Sent: Saturday, September 15, 2012 12:31 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
You use the alconox solution BEFORE aluminizing. Or at least that's what we did. I suspect, but do not know for sure, that if you use it on an already-aluminizers mirror, it might remove the aluminum. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
Great! Not too many Americans will be able to read them, however. I wonder how much it will cost to order them and have them shipped to the USA. Formidable! (en francais - en anglais ca ne veut rien dire!) ? Guy Brandenburg, Washington, DC? http://gfbrandenburg.wordpress.com/ http://home.earthlink.net/~gfbranden/GFB_Home_Page.html ============================ From: Charles Rydel To: "VacuumX@..." Sent: Saturday, September 15, 2012 4:26 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
Hi again, At the end the book is out, have a look here :?http://www.astrosurf.com/telastrograf/ ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Sent: Saturday, September 15, 2012 12:31 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
You use the alconox solution BEFORE aluminizing. Or at least that's what we did. I suspect, but do not know for sure, that if you use it on an already-aluminizers mirror, it might remove the aluminum. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
You need to make sure it's very very very clean before putting it in the bell jar. There are lots of methods used by different people. Some use a slurry of pure calcium carbonate precipitate with water. I examine how the water flows off the mirror. If I see raindrops like on a window then it's dirty. If the water flows off like a sheet with no holes then it's clean. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
Charles Rydel
Hi again, At the end the book is out, have a look here :? ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Sent: Saturday, September 15, 2012 12:31 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
You use the alconox solution BEFORE aluminizing. Or at least that's what we did. I suspect, but do not know for sure, that if you use it on an already-aluminizers mirror, it might remove the aluminum. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
Charles Rydel
Hi, That's the only think to do ? Whashed with alconox then water and the, in the belljare ? ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Sent: Saturday, September 15, 2012 4:12 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
It must be rinsed with water. Sometimes?I find a haze which must be rubbed off with a much-laundered cotton cloth. = |
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Re: New washing detergent for mirrors prior to aluminizing
It must be rinsed with water. Sometimes?I find a haze which must be rubbed off with a much-laundered cotton cloth. = |
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Re: New washing detergent for mirrors prior to aluminizing
Charles Rydel
Hi, The aime for sure is to do it before aluminize. Is it enough to wash with alconax before and then to alumining or the mirror must be whashed with something else ? ? Bien ¨¤ vous, Charles Rydel From: Guy Brandenburg To: "VacuumX@..." Sent: Saturday, September 15, 2012 12:31 PM Subject: Re: [VacuumX] Re: New washing detergent for mirrors prior to aluminizing
?
You use the alconox solution BEFORE aluminizing. Or at least that's what we did. I suspect, but do not know for sure, that if you use it on an already-aluminizers mirror, it might remove the aluminum. Guy = |
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Re: New washing detergent for mirrors prior to aluminizing
You use the alconox solution BEFORE aluminizing. Or at least that's what we did. I suspect, but do not know for sure, that if you use it on an already-aluminizers mirror, it might remove the aluminum. Guy = |
Kirk Wallace
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