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Attila, I would be concerned that outgassing from the tape would contaminate your plating. You may well end up with a very large virtual leak. I would suggest fashioning a mechanical system that would

Hello! I need to recoat two small mirror. One of them is 15mm diam and maybe 20gramm, the other is 24mmx36mm also very light. I have no idea how can I put the face down to the planetary holder. I

I second this recommendation. I've used Alconox for years to clean lab glassware and related items. It's good stuff. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

A friend of mine suggested Alconox as a new cleaning agent for use on mirrors prior to aluminization. I have tried it and found that it seems to work many, many times faster and more effectively at

oops, Still had a problem where it wouldn't pump below 100 microns. Upon examination I found that air was trapped in the high current feed throughs (yes both of them) Hopefully cutting a relief

Okay, I have been having trouble achieving a suitable vacuum. Today i replaced the o-ring seal on my diffusion pump. While I had it out I found the nameplate that said "use 50cc of DP oil. When I

I have had success using a rubber gasket under my bell jar. I coat the mating surfaces with a light coat of vacuum grease. I have also used soft wax (from a plumbers toilet seal) with success. Rubber

I suggest not using your plasma discharge cleaner system ( if you have one ) as out gassing of plasticizer from the plastic may form soot if exposed to plasma. Drew in sunny Florida

Is it more important that it be flat or shiny?

Just finished machining a 6061 Aluminum Baseplate for my Bell Jar. It's 14" in diameter by 1" Thick with a 4" hole in the center and drilled for a Conflat. I've yet to decide what type feedthroughs

You can aliminizr lots of plastics quite easily. The harder question is, can you cast it as an accurate paraboloid first? Guy

Can anyone tell me if TRIVEX --a plastic can be aluminized for telescope use?

Thank You Mr. Chutko. It's all clear now. I have a much better idea on how to proceed. I'll be back! (fair warning) Tom M.

Hi Tom, You are on a right track! Look at http://mdcvacuum.com/DisplayContentPage.aspx?d=MDC&cc=68155a96-2f81-4a65-907e-a7e409b179ed, and you'll see how internal and external centering rings should be

Hi Y'All! Newby here. I attempting to put together a Vacuum System using a junk box full of various Vacuum parts. I have two ISO-100 Flanges that I want to mate together. They are just smooth flat

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Hi: I just joined your group because I'm interested in PVD coatings, and what do you know, the very first message I see on your board is this: I had to do a (very) little research and discovered:

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