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Really suprised that they didn't use any cleanroon apparel.

Wow.

We strip our mirrors at the NCA_CCCC ATM workshop in a very similar fashion to what they did in this video:

-re-aluminization/

Seriously!!!

Never thought to use mops, though. We tend to use cotton balls instead. I just don't see any need for mops, somehow. Then again, we don't do very many 20-meter mirrors.

The only things we don't do:

add KOH to the CaCO3 solution

use HNO3 afterwards.

I'll try those.

I was more than a bit surprised that it did not look to me as if they were wearing masks when using the HCl + CuSO4 step ('green river) or the HNO3. Maybe I wasn't looking closely. I always have fans on when we use that.kind of stuff; it hurts my nasal passages...

Could anybody figure out what sort of towels those were?

?

Guy Brandenburg, Washington, DC?

My blog, mostly on Education in DC:

My home page on astronomy, mathematics, education:

or else ??

=====================================

From: Kevin Quin
To: Northern Virginia Astronomy Club
Sent: Thu, January 13, 2011 10:36:45 AM
Subject: Re: [NOVAC] Recoating a really BIG mirror

There were PEOPLE on the mirror!? Okay, not what I was expecting.? Gives me a whole new perspective on cleaning optics.

Kevin

The Hole in the Trees Skybox


--- On Wed, 1/12/11, Robert E. Ridgley <2102dex3624@...> wrote:

From: Robert E. Ridgley <2102dex3624@...>
Subject: [NOVAC] Recoating a really BIG mirror
To: "'Northern Virginia Astronomy Club'" <novac@...>
Date: Wednesday, January 12, 2011, 2:10 PM

Thought these two links to videos showing the cleaning and recoating of the
6.5 meter primary mirror of the MMTO (Multiple Mirror Telescope Observatory,
a joint facility of the Smithsonian Institution and the University of
Arizona) at Mt Whipple in Tucson, Arizona would be interesting.



Mirror cleaning and stripping, note the mops and paper towels:

-
re-aluminization/



Mirror recoating:





General information about the MMTO if you are interested:





Hope you find this interesting,

Bob Ridgley





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